County statistics of the United States

The counties are used in 48 of the 50 states of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

for the level of local government below the state itself. Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

uses parish

Parish

A parish is a territorial unit historically under the pastoral care and clerical jurisdiction of one parish priest, who might be assisted in his pastoral duties by a curate or curates - also priests but not the parish priest - from a more or less central parish church with its associated organization...

es, and Alaska

Alaska

Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

uses borough

Borough

A borough is an administrative division in various countries. In principle, the term borough designates a self-governing township although, in practice, official use of the term varies widely....

s. In several states in New England

New England

New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

, some or all counties within states have no governments of their own; the counties continue to exist as legal entities, however, and are used by states for some administrative functions and by the United States Census bureau for statistical analysis. There are 3,143 counties

County (United States)

In the United States, a county is a geographic subdivision of a state , usually assigned some governmental authority. The term "county" is used in 48 of the 50 states; Louisiana is divided into parishes and Alaska into boroughs. Parishes and boroughs are called "county-equivalents" by the U.S...

& county-equivalent

County-equivalent

A county-equivalent in the United States is a term used by the federal government to describe one of the two following governmental subdivisions:#A unit of local government in certain states which is comparable to a county as found in most states....

administrative units in total (source: count of list below).

There are 42 independent cities

Independent city

An independent city is a city that does not form part of another general-purpose local government entity. These type of cities should not be confused with city-states , which are fully sovereign cities that are not part of any other sovereign state.-Historical precursors:In the Holy Roman Empire,...

in the United States. In Virginia

Virginia

The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...

, any municipality that is incorporated as a city legally becomes independent of any county. Except where indicated, the statistics below do not include Virginia's 39 independent cities. The only Virginia statistic affected is smallest county by area; if independent cities are included, Falls Church

Falls Church, Virginia

The City of Falls Church is an independent city in Virginia, United States, in the Washington Metropolitan Area. The city population was 12,332 in 2010, up from 10,377 in 2000. Taking its name from The Falls Church, an 18th-century Anglican parish, Falls Church gained township status within...

becomes the smallest county in the state, and in fact the smallest county-level political subdivision in the United States, at 2 square miles (5.2 km²). The other three independent cities in other states (Baltimore, Maryland; Carson City, Nevada

Carson City, Nevada

The Consolidated Municipality of Carson City is the capital of the state of Nevada. The words Consolidated Municipality refer to a series of changes in 1969 which abolished Ormsby County and merged all the settlements contained within its borders into Carson City. Since that time Carson City has...

; and St. Louis, Missouri

St. Louis, Missouri

St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

) are also not included in these lists. The District of Columbia is included.

In Alaska

Alaska

, most of the land area of the state has no county-level government. Those parts of the state are divided by the United States Census Bureau

United States Census Bureau

The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...

into census areas, which are not the same as boroughs. The state's largest statistical division by area is the Yukon-Koyukuk Census Area

Yukon-Koyukuk Census Area, Alaska

Yukon-Koyukuk Census Area is a census area located in the state of Alaska, United States. As of the 2010 census, the population was 5,588. It is part of the unorganized borough and therefore has no borough seat...

, which is larger than any of the state's boroughs. Although Anchorage

Anchorage, Alaska

Anchorage is a unified home rule municipality in the southcentral part of the U.S. state of Alaska. It is the northernmost major city in the United States...

is called a municipality, it is considered a consolidated city and borough.

Although most U.S. counties were created during the 19th century, the most recent county in the United States is Broomfield County in Colorado, created in 2001.

List of counties & county-equivalents (by number per political division)

254 Texas
159 Georgia
134 Virginia (including 39 independent cities)
120 Kentucky
115 Missouri (including 1
St. Louis, Missouri
St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

independent city)
105 Kansas
102 Illinois
100 North Carolina
99 Iowa
95 Tennessee
93 Nebraska
92 Indiana
88 Ohio
87 Minnesota
83 Michigan
82 Mississippi
77 Oklahoma
75 Arkansas
72 Wisconsin
67 Alabama
67 Florida
67 Pennsylvania
66 South Dakota
64 Colorado
64 Louisiana (consisting in whole of parishes)
62 New York
58 California
56 Montana
55 West Virginia
53 North Dakota
46 South Carolina
44 Idaho
39 Washington
36 Oregon
33 New Mexico
29 Alaska (consisting of 18 organized boroughs and, in its Unorganized Borough, of 11 designated census areas)
29 Utah
24 Maryland (including 1
Baltimore
Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore...

independent city)
23 Wyoming
21 New Jersey
17 Nevada (including 1
Carson City, Nevada
The Consolidated Municipality of Carson City is the capital of the state of Nevada. The words Consolidated Municipality refer to a series of changes in 1969 which abolished Ormsby County and merged all the settlements contained within its borders into Carson City. Since that time Carson City has...

independent city)
16 Maine
15 Arizona
14 Massachusetts
14 Vermont
10 New Hampshire
8 Connecticut
5 Hawaii
5 Rhode Island
3 Delaware
1 District Of Columbia

3143 total (3007 counties

County (United States)

& 136 county-equivalent
County-equivalent
A county-equivalent in the United States is a term used by the federal government to describe one of the two following governmental subdivisions:#A unit of local government in certain states which is comparable to a county as found in most states....

s)

Average: 62

Twenty most populous counties in the United States

The population is based on a 2006 estimate. From the 2000 Census to the year 2004, all counties remained the same in ranking, while Dallas County

Dallas County, Texas

As of the census of 2000, there were 2,218,899 people, 807,621 households, and 533,837 families residing in the county. The population density was 2,523 people per square mile . There were 854,119 housing units at an average density of 971/sq mi...

overtook Queens County

Queens

Queens is the easternmost of the five boroughs of New York City. The largest borough in area and the second-largest in population, it is coextensive with Queens County, an administrative division of New York state, in the United States....

to rank ninth.

Rank	County	Population
1	Los Angeles County, California Los Angeles County, California Los Angeles County is a county in the U.S. state of California. As of 2010 U.S. Census, the county had a population of 9,818,605, making it the most populous county in the United States. Los Angeles County alone is more populous than 42 individual U.S. states...	9,948,081
2	Cook County, Illinois Cook County, Illinois Cook County is a county in the U.S. state of Illinois, with its county seat in Chicago. It is the second most populous county in the United States after Los Angeles County. The county has 5,194,675 residents, which is 40.5 percent of all Illinois residents. Cook County's population is larger than...	5,288,655
3	Harris County, Texas Harris County, Texas As of the 2010 Census, the population of the county was 4,092,459, White Americans made up 56.6% of Harris County's population; non-Hispanic whites represented 33.0% of the population. Black Americans made up 18.9% of the population. Native Americans made up 0.7% of Harris County's population...	4,092,459
4	Maricopa County, Arizona Maricopa County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:73.0% White5.0% Black2.1% Native American3.5% Asian0.2% Native Hawaiian or Pacific Islander3.5% Two or more races12.7% Other races29.6% Hispanic or Latino -2000:...	3,768,123
5	Orange County, California Orange County, California Orange County is a county in the U.S. state of California. Its county seat is Santa Ana. As of the 2010 census, its population was 3,010,232, up from 2,846,293 at the 2000 census, making it the third most populous county in California, behind Los Angeles County and San Diego County...	3,002,048
6	San Diego County, California San Diego County, California San Diego County is a large county located in the southwestern corner of the US state of California. Hence, San Diego County is also located in the southwestern corner of the 48 contiguous United States. Its county seat and largest city is San Diego. Its population was about 2,813,835 in the 2000...	2,941,454
7	Kings County, New York Brooklyn Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated...	2,508,820
8	Miami-Dade County, Florida Miami-Dade County, Florida Miami-Dade County is a county located in the southeastern part of the state of Florida. As of 2010 U.S. Census, the county had a population of 2,496,435, making it the most populous county in Florida and the eighth-most populous county in the United States...	2,402,208
9	Dallas County, Texas Dallas County, Texas As of the census of 2000, there were 2,218,899 people, 807,621 households, and 533,837 families residing in the county. The population density was 2,523 people per square mile . There were 854,119 housing units at an average density of 971/sq mi...	2,345,815
10	Queens County, New York Queens Queens is the easternmost of the five boroughs of New York City. The largest borough in area and the second-largest in population, it is coextensive with Queens County, an administrative division of New York state, in the United States....	2,255,175
11	Riverside County, California Riverside County, California Riverside County is a county in the U.S. state of California. One of 58 California counties, it covers in the southern part of the state, and stretches from Orange County to the Colorado River, which forms the state border with Arizona. The county derives its name from the city of Riverside,...	2,026,803
12	San Bernardino County, California San Bernardino County, California San Bernardino County is a county in the U.S. state of California. As of the 2010 census, the population was 2,035,210, up from 1,709,434 as of the 2000 census...	1,999,332
13	Wayne County, Michigan Wayne County, Michigan -History:Wayne County was one of the first counties formed when the Northwest Territory was organized. It was named for the American general "Mad Anthony" Wayne. It originally encompassed the entire area of the Lower Peninsula of Michigan, as well as small sections that are now part of northern...	1,946,419
14	King County, Washington King County, Washington King County is a county located in the U.S. state of Washington. The population in the 2010 census was 1,931,249. King is the most populous county in Washington, and the 14th most populous in the United States....	1,826,732
15	Broward County, Florida Broward County, Florida -2000 Census:As of the census of 2000, there were 1,623,018 people, 654,445 households, and 411,645 families residing in the county. The population density was 1,346 people per square mile . There were 741,043 housing units at an average density of 615 per square mile...	1,787,636
16	Clark County, Nevada Clark County, Nevada -Demographics:As of the census of 2000, there were 1,375,765 people, 512,253 households, and 339,693 families residing within the MSA. The racial makeup of the MSA was 71.6% White , 9.1% Black, 5.7% Asian, 0.8% American Indian and 12.8% of other or mixed race. 22.0% were Hispanic of any race...	1,777,539
17	Santa Clara County, California Santa Clara County, California Santa Clara County is a county located at the southern end of the San Francisco Bay Area in the U.S. state of California. As of 2010 it had a population of 1,781,642. The county seat is San Jose. The highly urbanized Santa Clara Valley within Santa Clara County is also known as Silicon Valley...	1,731,281
18	Tarrant County, Texas Tarrant County, Texas Tarrant County is a county located in the U.S. state of Texas. As of the 2010 U.S. Census, it had a population of 1,809,034. Its county seat is Fort Worth. Tarrant County is the sixteenth most populous county in the United States and the third most populous in Texas. The county is named in honor...	1,671,295
19	New York County, New York Manhattan Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...	1,611,581
20	Bexar County, Texas Bexar County, Texas As of the census of 2000, there were 1,392,931 people, 488,942 households, and 345,681 families residing in the county. The population density was 1,117 people per square mile . There were 521,359 housing units at an average density of 418 per square mile...	1,555,592

Twenty-five largest counties (or county equivalents) by land area

Data presented below is based on U.S. Census department data from 2000. Alaska's Unorganized Borough's

Unorganized Borough

The Unorganized Borough is the part of the U.S. state of Alaska not contained in any of its 18 organized boroughs. It encompasses more than half of Alaska's area, , an area larger than any other US state...

census areas have been considered county-equivalents; statistics for them are not included.

Rank	County name	Land Area (sq.mi.)	Population
1	Unorganized Borough Unorganized Borough The Unorganized Borough is the part of the U.S. state of Alaska not contained in any of its 18 organized boroughs. It encompasses more than half of Alaska's area, , an area larger than any other US state... , Alaska Alaska Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...	330,074.96	81,803
2	North Slope Borough, Alaska North Slope Borough, Alaska -National protected areas:* Alaska Maritime National Wildlife Refuge Cape Lisburne Cape Thompson* Arctic National Wildlife Refuge ** Mollie Beattie Wilderness * Gates of the Arctic National Park and Preserve...	88,817.12	7,385
3	Northwest Arctic Borough, Alaska Northwest Arctic Borough, Alaska -National protected areas:* Alaska Maritime National Wildlife Refuge ** Chamisso Wilderness* Bering Land Bridge National Preserve * Cape Krusenstern National Monument* Gates of the Arctic National Park and Preserve...	35,898.34	7,208
4	Matanuska-Susitna Borough, Alaska Matanuska-Susitna Borough, Alaska -National protected areas:* Chugach National Forest * Denali National Park and Preserve ** Denali Wilderness * Lake Clark National Park and Preserve ** Lake Clark Wilderness -Demographics:...	24,681.54	59,322
5	Lake and Peninsula Borough, Alaska Lake and Peninsula Borough, Alaska -National protected areas:* Alagnak Wild River* Alaska Maritime National Wildlife Refuge ** Sutwik Island* Alaska Peninsula National Wildlife Refuge * Aniakchak National Monument and Preserve...	23,781.96	1,823
6	San Bernardino County, California San Bernardino County, California San Bernardino County is a county in the U.S. state of California. As of the 2010 census, the population was 2,035,210, up from 1,709,434 as of the 2000 census...	20,052.50	1,709,434
7	Coconino County, Arizona Coconino County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:61.7% White1.2% Black27.3% Native American1.4% Asian0.1% Native Hawaiian or Pacific Islander3.1% Two or more races5.2% Other races13.5% Hispanic or Latino -2000:...	18,617.42	116,320
8	Nye County, Nevada Nye County, Nevada -National protected areas:* Ash Meadows National Wildlife Refuge* Death Valley National Park * Humboldt-Toiyabe National Forest * Spring Mountains National Recreation Area -Demographics:...	18,146.66	32,485
9	Elko County, Nevada Elko County, Nevada -Demographics:As of the census of 2000, there were 45,291 people, 15,638 households, and 11,493 families residing in the county. The population density was 3/sq mi . There were 18,456 housing units at an average density of 1/sq mi...	17,179.03	45,291
10	Kenai Peninsula Borough, Alaska Kenai Peninsula Borough, Alaska -National protected areas:* Alaska Maritime National Wildlife Refuge Chiswell Islands Tuxedni Wilderness* Chugach National Forest * Katmai National Park and Preserve ** Katmai Wilderness...	16,013.26	49,691
11	Mohave County, Arizona Mohave County, Arizona Mohave County is located in the northwestern corner of the U.S. state of Arizona. As of the 2010 census, its population was 200,186, an increase of 45,154 people since the 2000 census count of 155,032. The county seat is Kingman...	13,311.64	155,032
12	Denali Borough, Alaska Denali Borough, Alaska -Demographics:As of the census of 2000, there were 1,893 people, 785 households, and 452 families residing in the borough. The population density was 0 people per square mile . There were 1,351 housing units at an average density of 0 per square mile...	12,749.65	1,893
13	Apache County, Arizona Apache County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:23.3% White0.2% Black72.9% Native American0.3% Asian0.0% Native Hawaiian or Pacific Islander2.0% Two or more races1.3% Other races5.8% Hispanic or Latino -2000:...	11,204.88	69,423
14	Lincoln County, Nevada Lincoln County, Nevada Lincoln County is a county located in the U.S. state of Nevada. As of the 2000 census, the population was 4,165. Its county seat is Pioche.-History:...	10,633.61	4,165
15	Sweetwater County, Wyoming	10,425.30	37,613
16	Inyo County, California Inyo County, California -National protected areas:* Death Valley National Park * Inyo National Forest * Manzanar National Historic Site-Major highways:* U.S. Route 6* U.S. Route 395* State Route 127* State Route 136* State Route 168* State Route 178...	10,203.10	17,945
17	Harney County, Oregon Harney County, Oregon -National protected areas:Malheur National Forest Malheur National Wildlife Refuge*Ochoco National Forest -Demographics:As of the census of 2000, there were 7,609 people, 3,036 households, and 2,094 families residing in the county. The population density was 1 people per square mile...	10,134.33	7,609
18	Navajo County, Arizona Navajo County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:49.3% White0.9% Black43.4% Native American0.5% Asian0.1% Native Hawaiian or Pacific Islander2.5% Two or more races3.3% Other races10.8% Hispanic or Latino -2000:...	9,953.18	97,470
19	Malheur County, Oregon Malheur County, Oregon Malheur County is a county located in the southeast corner of the U.S. state of Oregon. It is included in the eight-county definition of Eastern Oregon. Most of the county observes the Mountain Time Zone, although the southern quarter of the county observes the Pacific Time Zone along with the...	9,887.09	31,615
20	Humboldt County, Nevada Humboldt County, Nevada Humboldt County is a county located in the U.S. state of Nevada. As of 2007, the population was estimated to be 18,052. Its county seat is Winnemucca.The county was the site of an arrest in 2000 that led to the U.S. Supreme Court decision Hiibel v...	9,647.91	16,106
21	Maricopa County, Arizona Maricopa County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:73.0% White5.0% Black2.1% Native American3.5% Asian0.2% Native Hawaiian or Pacific Islander3.5% Two or more races12.7% Other races29.6% Hispanic or Latino -2000:...	9,203.14	3,072,149
22	Pima County, Arizona Pima County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:74.3% White3.5% Black3.3% Native American2.6% Asian0.2% Native Hawaiian or Pacific Islander3.7% Two or more races12.4% Other races34.6% Hispanic or Latino -2000:...	9,186.27	843,746
23	Fremont County, Wyoming	9,182.27	35,804
24	White Pine County, Nevada White Pine County, Nevada White Pine County is a county located in the U.S. state of Nevada. Its population at the 2010 census was 10,030. Its county seat is Ely. It is the home of Great Basin National Park...	8,875.98	9,181
25	Idaho County, Idaho Idaho County, Idaho Idaho County is a county located in the U.S. state of Idaho. As of the 2010 Census the county had a population of 16,267. The county seat is Grangeville...	8,484.88	15,511

By size (total square miles, including water area)

	Smallest	Largest
All States	Arlington County, Virginia Arlington County, Virginia Arlington County is a county in the Commonwealth of Virginia. The land that became Arlington was originally donated by Virginia to the United States government to form part of the new federal capital district. On February 27, 1801, the United States Congress organized the area as a subdivision of... (26)	North Slope Borough, Alaska North Slope Borough, Alaska -National protected areas:* Alaska Maritime National Wildlife Refuge Cape Lisburne Cape Thompson* Arctic National Wildlife Refuge ** Mollie Beattie Wilderness * Gates of the Arctic National Park and Preserve... (94,763)
Alabama	Etowah County, Alabama Etowah County, Alabama Etowah County is a county of the U.S. state of Alabama. Its name is from the Cherokee language, which means "edible tree". It is the center of the Gadsden Metropolitan Area which includes Etowah and Cherokee Counties. As of 2010 the population was 104,430. Its county seat is Gadsden... (549)	Baldwin County, Alabama Baldwin County, Alabama -2010:Whereas according to the 2010 U.S. Census Bureau:85.7% White9.4% Black0.7% Native American0.7% Asian0.0% Native Hawaiian or Pacific Islander1.5% Two or more races*4.4% Hispanic or Latino -2000:... (2,027)
Alaska	Bristol Bay Borough, Alaska Bristol Bay Borough, Alaska As of the census of 2000, there were 1,258 people, 490 households, and 300 families residing in the borough. The population density was 2 people per square mile . There were 979 housing units at an average density of 2 per square mile... (888)	North Slope Borough, Alaska North Slope Borough, Alaska -National protected areas:* Alaska Maritime National Wildlife Refuge Cape Lisburne Cape Thompson* Arctic National Wildlife Refuge ** Mollie Beattie Wilderness * Gates of the Arctic National Park and Preserve... (94,763)
Arizona	Santa Cruz County, Arizona Santa Cruz County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:73.5% White0.4% Black0.7% Native American0.5% Asian0.0% Native Hawaiian or Pacific Islander2.0% Two or more races22.9% Other races82.8% Hispanic or Latino -2000:... (1,238)	Coconino County, Arizona Coconino County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:61.7% White1.2% Black27.3% Native American1.4% Asian0.1% Native Hawaiian or Pacific Islander3.1% Two or more races5.2% Other races13.5% Hispanic or Latino -2000:... (18,661)
Arkansas	Lafayette County, Arkansas (545)	Union County, Arkansas (1,055)
California	City and County of San Francisco, California (47)	San Bernardino County, California San Bernardino County, California San Bernardino County is a county in the U.S. state of California. As of the 2010 census, the population was 2,035,210, up from 1,709,434 as of the 2000 census... (20,105)
Colorado	City and County of Broomfield, Colorado Broomfield, Colorado The City and County of Broomfield is a prominent suburb and tier of the Denver metropolitan area in the State of Colorado of the United States. Broomfield has a consolidated city and county government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The... (28)	Las Animas County, Colorado Las Animas County, Colorado Las Animas County has the largest area of the 64 counties of the State of Colorado of the United States. Las Animas County takes its name from the Mexican Spanish name of the Purgatoire River, originally called El Río de las Ánimas Perdidas en Purgatorio, which means "River of the Lost Souls in... (4,775)
Connecticut	Tolland County, Connecticut Tolland County, Connecticut Tolland County is a county located in the northeastern part of Connecticut. As of 2010, the population was 152,691.Counties in Connecticut have no governmental function: all legal power is vested in the state, city, and town governments... (417)	Litchfield County, Connecticut Litchfield County, Connecticut Litchfield County is a county located in the northwestern corner of the U.S. state of Connecticut. Litchfield County has the lowest population density of any county in Connecticut but is geographically the state's largest county. As of 2010 the population was 189,927... (945)
Delaware	New Castle County, Delaware New Castle County, Delaware New Castle County is the northernmost of the three counties of the U.S. state of Delaware. As of 2010 its population was 538,479, an increase of 7.6% over the previous decade. The county seat is Wilmington. The center of population of Delaware is located in New Castle County, in the town of... (494)	Sussex County, Delaware Sussex County, Delaware Sussex County is a county located in the southern part of the U.S. state of Delaware. As of 2010 the population was 197,145, an increase of 25.9% over the previous decade. The county seat is Georgetown. The Seaford Micropolitan Statistical Area includes all of Sussex County.Sussex County is... (1,196)
Florida	Union County, Florida Union County, Florida Union County is a county located in the state of Florida. The U.S. Census Bureau 2005 estimate for the county was 14,916. The county seat is Lake Butler.- History :... (250)	Monroe County, Florida Monroe County, Florida Monroe County is a county located in the state of Florida. As of 2000, the population was 79,589. The U.S. Census Bureau 2006 estimate for the county was 74,737.... (3,737)
Georgia	Clarke County, Georgia Clarke County, Georgia Clarke County is a county in the U.S. state of Georgia. As of the 2000 census, the population was 101,489. The 2007 Census Estimate shows a population of 114,063... (121)	Ware County, Georgia Ware County, Georgia Ware County is a county located in the southeast of the U.S. state of Georgia. As of 2000, the population was 35,483. The 2007 Census Estimate shows a population of 35,831 The county seat is Waycross.... (906)
Hawaii	Kalawao County, Hawaii Kalawao County, Hawaii -Demographics:As of the census of 2000, there were 147 people, 115 households, and 21 families residing in the county. The population density was 11 people per square mile . There were 172 housing units at an average density of 13 per square mile... (52)	Hawaii County, Hawaii Hawaii County, Hawaii Hawaii County is a county located in the U.S. state of Hawaii in the Hawaiian Islands. It is coterminous with the Island of Hawaii, often called the "Big Island" to distinguish it from the state as a whole. As of the 2010 Census the population was 185,079. The county seat is Hilo. There are no... (5,087)
Idaho	Payette County, Idaho Payette County, Idaho Payette County is a county located in the U.S. state of Idaho. The county was established in 1917, and at the 2000 Census the county had a population of 20,578 . The county seat is Payette.... (410)	Idaho County, Idaho Idaho County, Idaho Idaho County is a county located in the U.S. state of Idaho. As of the 2010 Census the county had a population of 16,267. The county seat is Grangeville... (8,502)
Illinois	Putnam County, Illinois (172)	Cook County, Illinois Cook County, Illinois Cook County is a county in the U.S. state of Illinois, with its county seat in Chicago. It is the second most populous county in the United States after Los Angeles County. The county has 5,194,675 residents, which is 40.5 percent of all Illinois residents. Cook County's population is larger than... (1,635)
Indiana	Ohio County, Indiana Ohio County, Indiana As of the census of 2000, there were 5,623 people, 2,201 households, and 1,586 families residing in the county. The population density was 65 people per square mile . There were 2,424 housing units at an average density of 28 per square mile... (87)	Allen County, Indiana Allen County, Indiana As of the census of 2000, there were 331,849 people, 128,745 households, and 86,259 families residing in the county. The population density was 505 people per square mile . There were 138,905 housing units at an average density of 211 per square mile... (660)
Iowa	Dickinson County, Iowa Dickinson County, Iowa -2010 census:The 2010 census recorded a population of 16,667 in the county, with a population density of . There were 12,849 housing units, of which 7,554 were occupied.-2000 census:... (399)	Kossuth County, Iowa Kossuth County, Iowa -2010 census:The 2010 census recorded a population of 15,543 in the county, with a population density of . There were 7,486 housing units, of which 6,697 were occupied.-2000 census:... (974)
Kansas	Wyandotte County, Kansas Wyandotte County, Kansas Wyandotte County is a county located in northeast Kansas, in the Central United States. The county's population was 157,505 for the 2010 census. Its county seat and most populous city is Kansas City with which it shares a unified government... (156)	Butler County, Kansas Butler County, Kansas Butler County is a county located in South Central Kansas, in the Central United States. As of the 2010 census, the county population was 65,880. Its county seat and most populous city is El Dorado. The county is a part of the Wichita Metropolitan Statistical Area.-19th century:It was named in... (1,446)
Kentucky	Robertson County, Kentucky Robertson County, Kentucky Robertson County is a county located in the U.S. state of Kentucky. As of 2010, the population was 2,282. Its county seat is Mount Olivet, Kentucky. The county is named for George Robertson, a Kentucky Congressman from 1817 to 1821. Robertson is a prohibition or dry county... (100)	Pike County, Kentucky Pike County, Kentucky Pike County is a county located in the U.S. state of Kentucky. As of 2010, the population was 65,024. Its county seat is Pikeville. Pike is Kentucky's largest county in terms of land area. Pike County is the 11th largest county in Kentucky in terms of population preceded by Bullitt County and... (789)
Louisiana	West Baton Rouge Parish, Louisiana West Baton Rouge Parish, Louisiana West Baton Rouge Parish is one of the sixty-four parishes in the U.S. state of Louisiana, and is the smallest in total area. The parish seat is Port Allen and as of 2010, the population was 23,788. The parish has a highly-rated school system and is one of the few in Louisiana that has privatized... (204)	Plaquemines Parish, Louisiana Plaquemines Parish, Louisiana Plaquemines Parish is the parish with the most combined land and water area in the U.S. state of Louisiana. The parish seat is Pointe à la Hache... (2,429)
Maine	Sagadahoc County, Maine Sagadahoc County, Maine Sagadahoc County is a county located in the U.S. state of Maine. As of 2010, the population was 35,293. Its county seat is Bath. In total area, it is the smallest county in Maine.... (370)	Aroostook County, Maine Aroostook County, Maine Aroostook County is a county located in the U.S. state of Maine. In 2010, its population was 71,870. In land area, it is the largest county in the state and the largest U.S. county east of the Mississippi River. Its seat is Houlton... (6,829)
Maryland	Howard County, Maryland Howard County, Maryland -2010:Whereas according to the 2010 U.S. Census Bureau:62.2% White17.5% Black0.3% Native American14.4% Asian0.0% Native Hawaiian or Pacific Islander3.6% Two or more races2.0% Other races5.8% Hispanic or Latino -2000:... (254)	Dorchester County, Maryland Dorchester County, Maryland Dorchester County is a county located in the U.S. state of Maryland on its Eastern Shore. It is bordered by the Choptank River to the north, Talbot County to the northwest, Caroline County to the northeast, Wicomico County to the southeast, Sussex County, Delaware, to the east, and the Chesapeake... (983)
Massachusetts	Nantucket County, Massachusetts (105)	Worcester County, Massachusetts Worcester County, Massachusetts -Demographics:In 1990 Worcester County had a population of 709,705.As of the census of 2000, there were 750,963 people, 283,927 households, and 192,502 families residing in the county. The population density was 496 people per square mile . There were 298,159 housing units at an average density... (1,579)
Michigan	Cass County, Michigan Cass County, Michigan Cass County is a county in the U.S. state of Michigan. As of the 2000 census, the population was 51,104. It is part of the South Bend–Mishawaka, IN-MI, Metropolitan Statistical Area which has a total population of 316,663 and is sometimes considered part of Greater Michiana... (508)	Keweenaw County, Michigan Keweenaw County, Michigan -Demographics:As of the census of 2000, there were 2,301 people, 998 households, and 604 families residing in the county. The population density was 4 people per square mile . There were 2,327 housing units at an average density of 4 per square mile... (5,966)
Minnesota	Ramsey County, Minnesota Ramsey County, Minnesota Ramsey County is a county located in the U.S. state of Minnesota, founded in 1849. As of 2010, the population was 508,640. Its county seat is St. Paul, which is also Minnesota's state capital. The county is named for Alexander Ramsey , the first governor of the Minnesota Territory... (170)	St. Louis County, Minnesota St. Louis County, Minnesota St. Louis County is a county located in the U.S. state of Minnesota. As of 2010, the population was 200,226. Its county seat is Duluth. It is the largest county by total area in Minnesota, and the second largest in the United States east of the Mississippi River; in land area alone, after Aroostook... (6,860)
Mississippi	Alcorn County, Mississippi Alcorn County, Mississippi There were 14,224 households out of which 30.90% had children under the age of 18 living with them, 54.50% were married couples living together, 11.50% had a female householder with no husband present, and 30.30% were non-families. 27.60% of all households were made up of individuals and 11.90% had... (401)	Jackson County, Mississippi Jackson County, Mississippi There were 47,676 households out of which 37.00% had children under the age of 18 living with them, 55.70% were married couples living together, 14.50% had a female householder with no husband present, and 25.10% were non-families. 20.80% of all households were made up of individuals and 7.10% had... (1043)
Missouri	Worth County, Missouri (267)	Texas County, Missouri Texas County, Missouri Texas County is a county located in South Central Missouri in the United States. As of the 2010 census, the county's population was 26,008. It's county seat is Houston. The county was organized in 1843 as Ashley County, changing its name in 1845 to Texas, after the Republic of Texas. The 2010 U.S... (1,179)
Montana	Silver Bow County, Montana Silver Bow County, Montana -National protected areas:Beaverhead National Forest Deerlodge National Forest -Demographics:As of the census of 2000, there were 34,606 people, 14,432 households, and 8,933 families residing in the county. The population density was 48 people per square mile . There were 16,176 housing units at... (719)	Beaverhead County, Montana Beaverhead County, Montana -National protected areas:* Beaverhead National Forest * Big Hole National Battlefield* Nez Perce National Historical Park * Red Rock Lakes National Wildlife Refuge-History:... (5,572)
Nebraska	Sarpy County, Nebraska Sarpy County, Nebraska -Demographics:As of the census of 2000, there were 122,595 people, 43,426 households, and 33,220 families residing in the county. The population density was 510 people per square mile . There were 44,981 housing units at an average density of 187 per square mile... (247)	Cherry County, Nebraska Cherry County, Nebraska Cherry County is unusual in being split between two time zones, Mountain Time and Central Time. The lines between the two runs roughly north to south along the eastern third of the county. Cherry County is also the location of the Valentine National Wildlife Refuge, the Fort Niobrara National... (6,010)
Nevada	Storey County, Nevada Storey County, Nevada Storey County is a county located in the U.S. state of Nevada. As of the 2000 census, the population was 3,399, which was estimated to have risen to 4,110 in 2006... (264)	Nye County, Nevada Nye County, Nevada -National protected areas:* Ash Meadows National Wildlife Refuge* Death Valley National Park * Humboldt-Toiyabe National Forest * Spring Mountains National Recreation Area -Demographics:... (18,159)
New Hampshire	Strafford County, New Hampshire Strafford County, New Hampshire -Demographics:As of the census of 2000, there were 112,233 people, 42,581 households, and 27,762 families residing in the county. The population density was 304 people per square mile . There were 45,539 housing units at an average density of 124 per square mile... (384)	Coos County, New Hampshire Coos County, New Hampshire -National protected areas:Umbagog National Wildlife Refuge Silvio O. Conte National Fish and Wildlife Refuge *White Mountain National Forest -Demographics:... (1,831)
New Jersey	Hudson County, New Jersey Hudson County, New Jersey Hudson County is the smallest county in New Jersey and one of the most densely populated in United States. It takes its name from the Hudson River, which creates part of its eastern border. Part of the New York metropolitan area, its county seat and largest city is Jersey City.- Municipalities... (62)	Ocean County, New Jersey Ocean County, New Jersey -Demographics:As of the census of 2000, there were 510,916 people, 200,402 households, and 137,876 families residing in the county. The population density was 803 people per square mile . There were 248,711 housing units at an average density of 151/km²... (916)
New Mexico	Los Alamos County, New Mexico Los Alamos County, New Mexico -2010:Whereas according to the 2010 U.S. Census Bureau:87.8% White0.6% Black0.8% Native American6.0% Asian0.0% Native Hawaiian or Pacific Islander2.6% Two or more races2.2% Other races14.7% Hispanic or Latino -2000:... (109)	Catron County, New Mexico Catron County, New Mexico -2010:Whereas according to the 2010 U.S. Census Bureau:89.8% White0.4% Black2.7% Native American0.2% Asian0.0% Native Hawaiian or Pacific Islander3.1% Two or more races3.7% Other races19.0% Hispanic or Latino -2000:... (6,929)
New York	New York County, New York Manhattan Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York... (34)	St. Lawrence County, New York St. Lawrence County, New York St. Lawrence County is a county located in the U.S. state of New York. As of the 2010 census, the population was 111,944. The county seat is Canton. The county is named for the Saint Lawrence River, which in turn was named for the Catholic saint on whose Feast day the river was discovered by... (2,821)
North Carolina	Clay County, North Carolina Clay County, North Carolina -Communities and Townships:Hayesville, with a 2000 population of 297, is the only incorporated town in the county, the county seat, and center of economic activity for Clay County... (220)	Dare County, North Carolina Dare County, North Carolina -National protected areas:* Alligator River National Wildlife Refuge * Cape Hatteras National Seashore * Fort Raleigh National Historic Site* Pea Island National Wildlife Refuge* Wright Brothers National Memorial-Demographics:... (1,562)
North Dakota	Eddy County, North Dakota Eddy County, North Dakota -Major highways:* U.S. Highway 281North Dakota Highway 15North Dakota Highway 20-Eddy County Road 14:Eddy County Road 14 is a north-south County Road in North Dakota... (644)	McKenzie County, North Dakota McKenzie County, North Dakota -Major highways:* U.S. Highway 85* North Dakota Highway 22* North Dakota Highway 23* North Dakota Highway 58* North Dakota Highway 68* North Dakota Highway 73* North Dakota Highway 200* North Dakota Highway 1806-National protected areas:... (2,861)
Ohio	Carroll County, Ohio Carroll County, Ohio Carroll County is a county located in the state of Ohio. As of 2010, the population was 28,836, no change from 2000. Its county seat is Carrollton. It is named for Charles Carroll of Carrollton, the last surviving signer of the Declaration of Independence.... (399)	Ashtabula County, Ohio Ashtabula County, Ohio Ashtabula County is the northeasternmost county in the state of Ohio. As of 2010, the population was 101,497, its county seat is Jefferson. The county is named for a Native American word meaning "river of many fish".... (1,368)
Oklahoma	Marshall County, Oklahoma Marshall County, Oklahoma Marshall County is a county located in the U.S. state of Oklahoma. As of 2000, the population was 13,184. Its county seat is Madill. The county's population grew at a rate of 35% in the 1990s and now it has a new population estimate at 20,000. Marshall County is the fastest growing county in... (427)	Osage County, Oklahoma Osage County, Oklahoma Osage County is a county in the northern part of the U.S. state of Oklahoma. Coterminous with the Osage Indian Reservation, it is the home of the federally recognized Osage Nation. As of the 2010 census, the population was 47,472 a 6.8 percent increase from 2000, when the population was 44,437... (2,304)
Oregon	Multnomah County, Oregon Multnomah County, Oregon Multnomah County is one of 36 counties in the U.S. state of Oregon. Though smallest in area, it is the most populous as its county seat, Portland, is the state's largest city... (466)	Harney County, Oregon Harney County, Oregon -National protected areas:Malheur National Forest Malheur National Wildlife Refuge*Ochoco National Forest -Demographics:As of the census of 2000, there were 7,609 people, 3,036 households, and 2,094 families residing in the county. The population density was 1 people per square mile... (10,226)
Pennsylvania	Montour County, Pennsylvania Montour County, Pennsylvania Montour County is located in the U.S. state of Pennsylvania. In 2010, the county's population was 18,267. Its county seat is Danville. It is named for Andrew Montour, a prominent métis interpreter who served with George Washington during the French and Indian War. The county is part of the... (132)	Erie County, Pennsylvania Erie County, Pennsylvania Erie County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 280,566. Its county seat is the City of Erie.- Geography :... (1,558)
Rhode Island	Bristol County, Rhode Island Bristol County, Rhode Island The border with Bristol County, Massachusetts is rather unusual since the counties both share the same name. The only other instances in which two neighboring counties with the same name share a state border are Sabine County, Texas and Sabine Parish, Louisiana, Union Parish, Louisiana and Union... (45)	Washington County, Rhode Island Washington County, Rhode Island Washington County, commonly known colloquially as South County, is a county located in the southwestern part of the U.S. state of Rhode Island. Washington County borders Kent County to the north, New London County in Connecticut to the west, Suffolk County in New York to the southwest, the Atlantic... (563)
South Carolina	Calhoun County, South Carolina Calhoun County, South Carolina Calhoun County is a county located in the U.S. state of South Carolina. In 2000, its population was 15,185; a 2005 Census Bureau estimate placed the population at 15,100. It is named for John C. Calhoun, the former U.S. Vice-President, Senator, Representative and cabinet member from South... (392)	Charleston County, South Carolina Charleston County, South Carolina Charleston County is a county located in the U.S. state of South Carolina. According to a 2005 U.S. Census Bureau estimate, its population was 330,368. Its county seat is Charleston. It is the third-most populous county in the state . Charleston County was created in 1901 by an act of the South... (1,358)
South Dakota	Clay County, South Dakota (417)	Meade County, South Dakota Meade County, South Dakota As of the census of 2000, there were 24,253 people, 8,805 households, and 6,700 families residing in the county. The population density was 7 people per square mile . There were 10,149 housing units at an average density of 3 per square mile... (3,482)
Tennessee	Trousdale County, Tennessee (117)	Shelby County, Tennessee Shelby County, Tennessee Shelby County is a county located in the U.S. state of Tennessee. It is the state's largest both in terms of population and geographic area, with a population of 927,644 at the 2010 census... (784)
Texas	Rockwall County, Texas Rockwall County, Texas As of the census of 2000, there were 43,080 people, 14,530 households, and 11,972 families residing in the county. The population density was 334 people per square mile . There were 15,351 housing units at an average density of 119 per square mile... (149)	Brewster County, Texas Brewster County, Texas Brewster County is a county located in western part of the US state of Texas, along the border with Mexico. It is one of the nine counties that comprise the Trans-Pecos region of West Texas. As of the 2000 census, the population is 8,866. In 2009, the population was estimated to be 9,481. Its... (6,193)
Utah	Davis County, Utah Davis County, Utah Davis County is a county located in the U.S. state of Utah. As of 2010 the population was 306,479, a 28.2% increase over the 2000 figure of 238,994. It was named for Daniel C. Davis, captain in the Mormon Battalion. The county is part of the Ogden–Clearfield Metropolitan Statistical Area as... (787)	San Juan County, Utah San Juan County, Utah As of the current census of 2010, there were 14,746 people and 4,505 households. The racial and ethnic composition of the population was 50.4% Native American, 45.8% white, 0.3% Asian, 0.2% African American and 2.3% reporting two or more races... (7,933)
Vermont	Grand Isle County, Vermont Grand Isle County, Vermont Grand Isle County is a county located in the U.S. state of Vermont. As of 2010, the population was 6,970. Its shire town is North Hero.Grand Isle County is part of the Burlington-South Burlington, VT Metropolitan Statistical Area.-Geography:... (195)	Windsor County, Vermont (976)
Virginia	Arlington County, Virginia Arlington County, Virginia Arlington County is a county in the Commonwealth of Virginia. The land that became Arlington was originally donated by Virginia to the United States government to form part of the new federal capital district. On February 27, 1801, the United States Congress organized the area as a subdivision of... (26)	Accomack County, Virginia Accomack County, Virginia As of the census of 2010, there were 33,164 people, 15,299 households, and 10,388 families residing in the county. The population density was 84 people per square mile . There were 19,550 housing units at an average density of 43 per square mile... (1,310)
Washington	Wahkiakum County, Washington (287)	Okanogan County, Washington (5,315)
West Virginia	Hancock County, West Virginia Hancock County, West Virginia As of the census of 2000, there were 32,667 people, 13,678 households, and 9,506 families residing in the county. The population density was 394 people per square mile . There were 14,728 housing units at an average density of 178 per square mile... (88)	Randolph County, West Virginia Randolph County, West Virginia As of the census of 2000, there were 28,262 people, 11,072 households, and 7,661 families residing in the county. The population density was 27 people per square mile . There were 13,478 housing units at an average density of 13 per square mile... (1,040)
Wisconsin	Pepin County, Wisconsin (249)	Door County, Wisconsin Door County, Wisconsin Door County is a county in the U.S. state of Wisconsin. As of 2000, the population was 27,961. Its county seat is Sturgeon Bay. Door County is a popular vacation and tourist destination, especially for residents of Wisconsin and Illinois.... (2,370)
Wyoming	Hot Springs County, Wyoming (2,006)	Sweetwater County, Wyoming (10,491)

The North Slope Borough is the largest independently incorporated county. The Unorganized Borough is substantially larger, but is an extension of the State of Alaska government and not independently incorporated.

By population (as of 2000)

	Smallest	Largest
All States	Loving County, Texas Loving County, Texas US Census 2000Of the 67 residents, 60 were White, 6 of "some other race", and 1 person of two or more races. There were 7 residents who were Hispanic or Latino of any race... (67)	Los Angeles County, California Los Angeles County, California Los Angeles County is a county in the U.S. state of California. As of 2010 U.S. Census, the county had a population of 9,818,605, making it the most populous county in the United States. Los Angeles County alone is more populous than 42 individual U.S. states... (9,519,338)
Alabama	Greene County, Alabama Greene County, Alabama Greene County is the least populous county in the U.S. state of Alabama. Its name is in honor of Revolutionary War General Nathanael Greene of Rhode Island. As of 2010 the population was 9,045... (9,974)	Jefferson County, Alabama Jefferson County, Alabama Jefferson County is the most populous county in the U.S. state of Alabama, with its county seat being located in Birmingham.As of the 2010 U.S. Census, the population of Jefferson County was 658,466... (662,047)
Alaska	Yakutat City and Borough, Alaska Yakutat City and Borough, Alaska Yakutat City and Borough is a unified city-borough in the U.S. state of Alaska. As of the 2010 census, the population was 4035. The name is Tlingit, Yaakwdáat, meaning "the place where canoes rest", but it originally derives from an Eyak name diyaʼqudaʼt and was influenced by the Tlingit word... (808)	Municipality of Anchorage, Alaska Anchorage, Alaska Anchorage is a unified home rule municipality in the southcentral part of the U.S. state of Alaska. It is the northernmost major city in the United States... (260,283)
Arizona	Greenlee County, Arizona Greenlee County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:77.2% White1.1% Black2.3% Native American0.5% Asian0.1% Native Hawaiian or Pacific Islander3.8% Two or more races15.0% Other races47.9% Hispanic or Latino -2000:... (8,547)	Maricopa County, Arizona Maricopa County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:73.0% White5.0% Black2.1% Native American3.5% Asian0.2% Native Hawaiian or Pacific Islander3.5% Two or more races12.7% Other races29.6% Hispanic or Latino -2000:... (3,072,149)
Arkansas	Calhoun County, Arkansas (5,744)	Pulaski County, Arkansas (361,474)
California	Alpine County, California Alpine County, California Alpine County is the smallest county, by population, in the U.S. state of California. As of 2010, it had a population of 1,175, all rural. There are no incorporated cities in the county. The county seat is Markleeville... (1,208)	Los Angeles County, California Los Angeles County, California Los Angeles County is a county in the U.S. state of California. As of 2010 U.S. Census, the county had a population of 9,818,605, making it the most populous county in the United States. Los Angeles County alone is more populous than 42 individual U.S. states... (9,519,338)
Colorado	San Juan County, Colorado San Juan County, Colorado San Juan County is the least populous of the 64 counties of the state of Colorado in the United States. The county name is the Spanish language name for “Saint John”, the name Spanish explorers gave to a river and the mountain range in the area. The county population was 558 at U.S. Census 2000... (558)	City and County of Denver, Colorado (554,636)
Connecticut	Windham County, Connecticut Windham County, Connecticut Windham County is a county located in the northeastern corner of the U.S. state of Connecticut. As of 2010, the population was 118,428.The entire county is within the Quinebaug and Shetucket Rivers Valley National Heritage Corridor, as designated by the National Park Service.-History:Windham... (109,091)	Fairfield County, Connecticut Fairfield County, Connecticut Fairfield County is a county located in the southwestern corner of the U.S. state of Connecticut. The county population is 916,829 according to the 2010 Census. There are currently 1,465 people per square mile in the county. It is the most populous county in the State of Connecticut and contains... (882,567)
Delaware	Kent County, Delaware Kent County, Delaware Kent County is a county located in the central part of the U.S. state of Delaware. It is coextensive with the Dover, Delaware, Metropolitan Statistical Area. As of 2010 the population was 162,310, a 28.1% increase over the previous decade. The county seat is Dover, the state capital... (126,697)	New Castle County, Delaware New Castle County, Delaware New Castle County is the northernmost of the three counties of the U.S. state of Delaware. As of 2010 its population was 538,479, an increase of 7.6% over the previous decade. The county seat is Wilmington. The center of population of Delaware is located in New Castle County, in the town of... (500,265)
District of Columbia	Washington, D.C. Washington, D.C. Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution.... (572,059)
Florida	Liberty County, Florida Liberty County, Florida Liberty County is a county located in the state of Florida. Its population was estimated in 2005 as 7,733. Its most populous incorporated area and county seat is Bristol.... (7,021)	Miami-Dade County, Florida Miami-Dade County, Florida Miami-Dade County is a county located in the southeastern part of the state of Florida. As of 2010 U.S. Census, the county had a population of 2,496,435, making it the most populous county in Florida and the eighth-most populous county in the United States... (2,253,362)
Georgia	Taliaferro County, Georgia Taliaferro County, Georgia Taliaferro County is a county located in the U.S. state of Georgia. As of the 2000 census, the population was 2,077, making it the least populous county east of the Mississippi River. The 2007 Census Estimate shows a population of 1,884. The county seat is Crawfordville.The spelling of the... (2,077)	Fulton County, Georgia Fulton County, Georgia Fulton County is a county located in the U.S. state of Georgia. Its county seat is Atlanta, the state capital since 1868 and the principal county of the Atlanta metropolitan area... (816,006)
Hawaii	Kalawao County, Hawaii Kalawao County, Hawaii -Demographics:As of the census of 2000, there were 147 people, 115 households, and 21 families residing in the county. The population density was 11 people per square mile . There were 172 housing units at an average density of 13 per square mile... (147)	City & County of Honolulu (876,156)
Idaho	Camas County, Idaho Camas County, Idaho Camas County is a county in the southern portion of the U.S. state of Idaho. As of the 2000 Census, the rural county had a population of 991 . The county seat is Fairfield.... (991)	Ada County, Idaho Ada County, Idaho Ada County is a county in the southwestern part of the U.S. state of Idaho. As of the 2010 Census, the county had a population of 392,365. The county seat and largest city is Boise, which is also the state capital. Other cities in the county with over 10,000 residents include Meridian, Eagle,... (300,904)
Illinois	Pope County, Illinois (4,413)	Cook County, Illinois Cook County, Illinois Cook County is a county in the U.S. state of Illinois, with its county seat in Chicago. It is the second most populous county in the United States after Los Angeles County. The county has 5,194,675 residents, which is 40.5 percent of all Illinois residents. Cook County's population is larger than... (5,376,741)
Indiana	Ohio County, Indiana Ohio County, Indiana As of the census of 2000, there were 5,623 people, 2,201 households, and 1,586 families residing in the county. The population density was 65 people per square mile . There were 2,424 housing units at an average density of 28 per square mile... (5,623)	Marion County, Indiana Marion County, Indiana Marion County is a county located in the U.S. state of Indiana. Census 2010 recorded a population of 903,393, making it the largest county in the state and 55th most populated county in the country, greater than the population of six states. The county seat is Indianapolis, the state capital and... (860,454)
Iowa	Adams County, Iowa Adams County, Iowa -2010 census:The 2010 census recorded a population of 4,029 in the county, with a population density of . There were 2,010 housing units, of which 1,715 were occupied.-2000 census:... (4,482)	Polk County, Iowa Polk County, Iowa Polk County is a county located in the U.S. state of Iowa. The population was 430,640 in the 2010 census, an increase from 374,601 in the 2000 census. The county seat is Des Moines, which is also the capital city of Iowa... (374,601)
Kansas	Greeley County, Kansas Greeley County, Kansas Greeley County is a county located in West Central Kansas, in the Central United States. As of the 2010 census, the county population was 1,247, which is the lowest in Kansas. Its county seat and largest town is Tribune... (1,534)	Johnson County, Kansas Johnson County, Kansas Johnson County is a county located in northeast Kansas, in the central United States. The county is largely suburban, being part of the Kansas City metropolitan area, and containing many of its affluent southwestern suburbs. As of the 2010 census, the county population was 544,179. Its county... (451,086)
Kentucky	Robertson County, Kentucky Robertson County, Kentucky Robertson County is a county located in the U.S. state of Kentucky. As of 2010, the population was 2,282. Its county seat is Mount Olivet, Kentucky. The county is named for George Robertson, a Kentucky Congressman from 1817 to 1821. Robertson is a prohibition or dry county... (2,266)	Jefferson County, Kentucky Jefferson County, Kentucky As of the census of 2000, there were 693,604 people, 287,012 households, and 183,113 families residing in the county. The population density was . There were 305,835 housing units at an average density of... (693,604)
Louisiana	Tensas Parish, Louisiana Tensas Parish, Louisiana Tensas Parish is a parish located in the U.S. state of Louisiana. The seat of the parish is St. Joseph. In 2010, the population of Tensas Parish was 5,252; it is the least-populous of all sixty-four parishes.... (6,618)	East Baton Rouge Parish, Louisiana East Baton Rouge Parish, Louisiana East Baton Rouge Parish is a parish located in the U.S. state of Louisiana. The parish seat is Baton Rouge, Louisiana's state capital. As of the 2010 census, the population was 440,171. The parish has a total area of , of which is land and is water. It is the most populous parish in the state... * (440,171)
Maine	Piscataquis County, Maine Piscataquis County, Maine Piscataquis County is a county located in the U.S. state of Maine. In 2010, its population was 17,535, making it Maine's least-populous county. Its county seat is Dover-Foxcroft.... (17,235)	Cumberland County, Maine Cumberland County, Maine Cumberland County is a county located in the U.S. state of Maine. As of 2010, the population was 281,674. Its county seat is Portland, and is the most populous of the sixteen Maine counties, as well as the most affluent. Cumberland County has the deepest and second largest body of water in the... (265,612)
Maryland	Kent County, Maryland Kent County, Maryland Kent County is a county located in the U.S. state of Maryland, on its Eastern Shore. It was named for the county of Kent in England. Its county seat is Chestertown. In 2010, the county population was 20,197... (19,197)	Montgomery County, Maryland Montgomery County, Maryland Montgomery County is a county in the U.S. state of Maryland, situated just to the north of Washington, D.C., and southwest of the city of Baltimore. It is one of the most affluent counties in the United States, and has the highest percentage of residents over 25 years of age who hold post-graduate... (873,341)
Massachusetts	Town and County of Nantucket, Massachusetts Nantucket, Massachusetts Nantucket is an island south of Cape Cod, Massachusetts, in the United States. Together with the small islands of Tuckernuck and Muskeget, it constitutes the town of Nantucket, Massachusetts, and the coterminous Nantucket County, which are consolidated. Part of the town is designated the Nantucket... (9,520)	Middlesex County, Massachusetts Middlesex County, Massachusetts -National protected areas:* Assabet River National Wildlife Refuge* Great Meadows National Wildlife Refuge* Longfellow National Historic Site* Lowell National Historical Park* Minute Man National Historical Park* Oxbow National Wildlife Refuge... (1,465,396)
Michigan	Keweenaw County, Michigan Keweenaw County, Michigan -Demographics:As of the census of 2000, there were 2,301 people, 998 households, and 604 families residing in the county. The population density was 4 people per square mile . There were 2,327 housing units at an average density of 4 per square mile... (2,301)	Wayne County, Michigan Wayne County, Michigan -History:Wayne County was one of the first counties formed when the Northwest Territory was organized. It was named for the American general "Mad Anthony" Wayne. It originally encompassed the entire area of the Lower Peninsula of Michigan, as well as small sections that are now part of northern... (2,061,162)
Minnesota	Traverse County, Minnesota Traverse County, Minnesota As of the census of 2000, there were 4,134 people, 1,717 households, and 1,129 families residing in the county. The population density was 7 people per square mile . There were 2,199 housing units at an average density of 4 per square mile... (4,134)	Hennepin County, Minnesota Hennepin County, Minnesota Hennepin County is a county located in the U.S. state of Minnesota, named in honor of the 17th-century explorer Father Louis Hennepin. As of 2010 the population was 1,152,425. Its county seat is Minneapolis. It is by far the most populous county in Minnesota; more than one in five Minnesotans live... (1,116,200)
Mississippi	Issaquena County, Mississippi Issaquena County, Mississippi -Demographics:As of the census of 2000, there were 2,274 people, 726 households, and 509 families residing in the county. The population density was 5.15 people per square mile . There were 877 housing units at an average density of 2 per square mile... (2,274)	Hinds County, Mississippi Hinds County, Mississippi As of the census of 2000, there were 250,800 people, 91,030 households, and 62,355 families residing in the county. The population density was 288 people per square mile . There were 100,287 housing units at an average density of 115 per square mile... (250,800)
Missouri	Worth County, Missouri (2,382)	St. Louis County, Missouri St. Louis County, Missouri St. Louis County is a county located in the U.S. state of Missouri. Its county seat is Clayton. St. Louis County is part of the St. Louis Metro Area wherein the independent City of St. Louis and its suburbs in St. Louis County, as well as the surrounding counties in both Missouri and Illinois all... (1,016,315)
Montana	Petroleum County, Montana Petroleum County, Montana -National protected areas:Charles M. Russell National Wildlife Refuge War Horse National Wildlife Refuge-Demographics:At the 2000 census, there were 493 people, 211 households and 136 families residing in the county. The population density was 0.29 per square mile . There were 292 housing units... (493)	Yellowstone County, Montana Yellowstone County, Montana -National protected areas:* Nez Perce National Historical Park * Pompeys Pillar National Monument-Demographics:As of the census of 2000, there were 129,352 people, 52,084 households, and 34,219 families residing in the county. The population density was 49 people per square mile . There were... (129,352)
Nebraska	Arthur County, Nebraska Arthur County, Nebraska -Demographics:As of the census of 2000, there were 444 people, 185 households, and 138 families residing in the county. The population density was 0.618 people per square mile . There were 273 housing units at an average density of 0.380 per square mile... (444)	Douglas County, Nebraska Douglas County, Nebraska -Demographics:As of the census of 2000, there were 463,585 people, 182,194 households, and 115,146 families residing in the county. The population density was 1,401 people per square mile . There were 192,672 housing units at an average density of 582 per square mile... (463,585)
Nevada	Esmeralda County, Nevada Esmeralda County, Nevada Esmeralda County is a county in the west of U.S. state of Nevada. Its county seat is Goldfield. Its 2000 census population was officially 971, making its population density 0.1045 inhabitants/km² , the second-lowest of any county-equivalent outside of Alaska. As of 2010, the population had... (971)	Clark County, Nevada Clark County, Nevada -Demographics:As of the census of 2000, there were 1,375,765 people, 512,253 households, and 339,693 families residing within the MSA. The racial makeup of the MSA was 71.6% White , 9.1% Black, 5.7% Asian, 0.8% American Indian and 12.8% of other or mixed race. 22.0% were Hispanic of any race... (1,375,765)
New Hampshire	Coos County, New Hampshire Coos County, New Hampshire -National protected areas:Umbagog National Wildlife Refuge Silvio O. Conte National Fish and Wildlife Refuge *White Mountain National Forest -Demographics:... (33,111)	Hillsborough County, New Hampshire Hillsborough County, New Hampshire -Demographics:As of the census of 2000, there were 380,841 people, 144,455 households, and 98,807 families residing in the county. The population density was 435 people per square mile . There were 149,961 housing units at an average density of 171 per square mile... (380,841)
New Jersey	Salem County, New Jersey Salem County, New Jersey -Demographics:As of the census of 2000, there were 64,285 people, 24,295 households, and 17,370 families residing in the county. The population density was 190 people per square mile . There were 26,158 housing units at an average density of 77 per square mile... (65,285)	Bergen County, New Jersey Bergen County, New Jersey Bergen County is the most populous county of the state of New Jersey, United States. As of the 2010 United States Census, its population was 905,116. The county is part of the New York City Metropolitan Area. Its county seat is Hackensack... (884,118)
New Mexico	Harding County, New Mexico Harding County, New Mexico Harding County is a county located in the U.S. state of New Mexico. As of 2010, the population was 695, the lowest in the state. Its county seat is the Village of Mosquero. The county is named for United States President Warren G... (810)	Bernalillo County, New Mexico Bernalillo County, New Mexico -2010:Whereas according to the 2010 U.S. Census Bureau:69.4% White3.0% Black4.8% Native American2.3% Asian0.1% Native Hawaiian or Pacific Islander4.4% Two or more races16.0% Other races47.9% Hispanic or Latino -2000:... (635,139)
New York	Hamilton County, New York Hamilton County, New York Hamilton County is a county located in the U.S. state of New York. It is named after Alexander Hamilton, the only member of the New York State delegation who signed the United States Constitution in 1787 and later the first United States Secretary of the Treasury. Its county seat is Lake Pleasant... (5,379)	Kings County, New York Brooklyn Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated... (2,465,326)
North Carolina	Tyrrell County, North Carolina Tyrrell County, North Carolina -Demographics:Tyrrell County was as of 2000 the least populous county in North Carolina.As of the census of 2000, there were 4,149 people, 1,537 households, and 1,055 families residing in the county. The population density was 11 people per square mile . There were 2,032 housing units at an... (4,149)	Mecklenburg County, North Carolina Mecklenburg County, North Carolina -Air:The county's primary commercial aviation airport is Charlotte Douglas International Airport in Charlotte.- Intercity rail :With twenty-five freight trains a day, Mecklenburg is a freight railroad transportation center, largely due to its place on the NS main line between Washington and Atlanta... (909,493 )
North Dakota	Slope County, North Dakota Slope County, North Dakota There were 313 households out of which 30.0% had children under the age of 18 living with them, 64.5% were married couples living together, 3.8% had a female householder with no husband present, and 28.8% were non-families. 27.2% of all households were made up of individuals and 10.5% had someone... (767)	Cass County, North Dakota Cass County, North Dakota -Demographics:As of the census of 2000, there were 123,138 people, 51,315 households, and 29,814 families residing in the county. The population density was 70 people per square mile . There were 53,790 housing units at an average density of 30 per square mile... (123,138)
Ohio	Vinton County, Ohio Vinton County, Ohio Vinton County is a county located in the state of Ohio, United States. As of the 2010 census, the population was 13,435. , the least populous in the state. Its county seat is McArthur. The county is named for Samuel Finley Vinton, a 19th-century United States Congressman from... (12,806)	Cuyahoga County, Ohio Cuyahoga County, Ohio Cuyahoga County is a county located in the state of Ohio, United States. It is the most populous county in Ohio; as of the 2010 census, the population was 1,280,122. Its county seat is Cleveland. Cuyahoga County is part of Greater Cleveland, a metropolitan area, and Northeast Ohio, a... (1,393,978)
Oklahoma	Cimarron County, Oklahoma Cimarron County, Oklahoma Cimarron County is a county located in the U.S. state of Oklahoma. Throughout most of its history it has had the smallest population and the lowest population density of any county in Oklahoma. As of 2010 census, the population was 2,475... (3,148)	Oklahoma County, Oklahoma Oklahoma County, Oklahoma Oklahoma County is a county located in the central partof the U.S. state of Oklahoma. The population was 718,633 at the 2010 census. The county seat and principal city is Oklahoma City... (660,448)
Oregon	Wheeler County, Oregon Wheeler County, Oregon As of the census of 2000, there were 1,547 people, 653 households, and 444 families residing in the county. The population density was 1 people per square mile . There were 842 housing units at an average density of 0 per square mile... (1,547)	Multnomah County, Oregon Multnomah County, Oregon Multnomah County is one of 36 counties in the U.S. state of Oregon. Though smallest in area, it is the most populous as its county seat, Portland, is the state's largest city... (660,486)
Pennsylvania	Forest County, Pennsylvania Forest County, Pennsylvania Forest County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 7,716. Forest County is famous as a rural retreat. Nearly 75% of all dwellings in the county are second or vacation homes . Forest County does not have a single traffic light, the only county in the... (4,946)	Philadelphia County, Pennsylvania Philadelphia County, Pennsylvania -History:Tribes of Lenape were the first known occupants in the area which became Philadelphia County. The first European settlers were Swedes and Finns who arrived in 1638. The Netherlands seized the area in 1655, but permanently lost control to England in 1674... (1,517,550)
Rhode Island	Bristol County, Rhode Island Bristol County, Rhode Island The border with Bristol County, Massachusetts is rather unusual since the counties both share the same name. The only other instances in which two neighboring counties with the same name share a state border are Sabine County, Texas and Sabine Parish, Louisiana, Union Parish, Louisiana and Union... (50,648)	Providence County, Rhode Island Providence County, Rhode Island -Demographics:As of the census of 2000, there were 621,602 people, 239,936 households, and 152,839 families residing in the county. The population density was 1,504 people per square mile . There were 253,214 housing units at an average density of 613 per square mile... (621,602)
South Carolina	McCormick County, South Carolina (9,958)	Greenville County, South Carolina Greenville County, South Carolina - External Links :*... (379,616)
South Dakota	Jones County, South Dakota Jones County, South Dakota As of the census of 2000, there were 1,193 people, 509 households, and 327 families residing in the county. The population density was 1 people per square mile . There were 614 housing units at an average density of 1 per square mile... (1,193)	Minnehaha County, South Dakota Minnehaha County, South Dakota As of the census of 2000, there were 148,281 people, 57,996 households, and 37,581 families residing in the county. The population density was 183 people per square mile . There were 60,237 housing units at an average density of 74 per square mile... (148,281)
Tennessee	Pickett County, Tennessee (4,945)	Shelby County, Tennessee Shelby County, Tennessee Shelby County is a county located in the U.S. state of Tennessee. It is the state's largest both in terms of population and geographic area, with a population of 927,644 at the 2010 census... (897,472)
Texas	Loving County, Texas Loving County, Texas US Census 2000Of the 67 residents, 60 were White, 6 of "some other race", and 1 person of two or more races. There were 7 residents who were Hispanic or Latino of any race... (67)	Harris County, Texas Harris County, Texas As of the 2010 Census, the population of the county was 4,092,459, White Americans made up 56.6% of Harris County's population; non-Hispanic whites represented 33.0% of the population. Black Americans made up 18.9% of the population. Native Americans made up 0.7% of Harris County's population... (3,400,578)
Utah	Daggett County, Utah Daggett County, Utah Daggett County is a county located in the northeastern corner of the U.S. state of Utah. The population was 1,059 at the 2010 census. It was named for Ellsworth Daggett, the first surveyor-general of Utah. Its county seat and only municipality is Manila. There is one other small community, Dutch... (921)	Salt Lake County, Utah Salt Lake County, Utah Salt Lake County is a county located in the U.S. state of Utah. It had a population of 1,029,655 at the 2010 census. Its county seat and largest city is Salt Lake City, the state capital. It occupies Salt Lake Valley, as well as parts of the surrounding mountains, the Oquirrh Mountains to the west... (978,701)
Vermont	Essex County, Vermont Essex County, Vermont Essex County is the county located in the northeastern part of the U.S. state of Vermont. As of 2010, the population was 6,306, making it the least-populous county in both Vermont and New England... (6,459)	Chittenden County, Vermont Chittenden County, Vermont Chittenden County is a county located in the U.S. state of Vermont. As of 2010, the population was 156,545. Its shire town is Burlington. Chittenden is the most populous county in the state, with more than twice as many residents as Vermont's second-most populous county, Rutland.Chittenden County... (146,571)
Virginia	Highland County, Virginia Highland County, Virginia As of the census of 2000, there were 2,536 people, 1,131 households, and 764 families residing in the county. The population density was 6 people per square mile . There were 1,822 housing units at an average density of 4 per square mile... (2,536)	Fairfax County, Virginia Fairfax County, Virginia Fairfax County is a county in Virginia, in the United States. Per the 2010 Census, the population of the county is 1,081,726, making it the most populous jurisdiction in the Commonwealth of Virginia, with 13.5% of Virginia's population... (969,749)
Washington	Garfield County, Washington (2,397)	King County, Washington King County, Washington King County is a county located in the U.S. state of Washington. The population in the 2010 census was 1,931,249. King is the most populous county in Washington, and the 14th most populous in the United States.... (1,737,034)
West Virginia	Wirt County, West Virginia Wirt County, West Virginia As of the census of 2000, there were 5,873 people, 2,284 households, and 1,699 families residing in the county. The population density was 25 people per square mile . There were 3,266 housing units at an average density of 14 per square mile... (5,873)	Kanawha County, West Virginia Kanawha County, West Virginia As of the census of 2000, there were 200,073 people, 86,226 households, and 55,960 families residing in the county. The population density was 222 people per square mile . There were 93,788 housing units at an average density of 104 per square mile... (200,073)
Wisconsin	Menominee County, Wisconsin (4,562)	Milwaukee County, Wisconsin (940,164)
Wyoming	Niobrara County, Wyoming (2,407)	Laramie County, Wyoming Laramie County, Wyoming Laramie County is the most populous of the 23 counties of the U.S. state of Wyoming. The county is located in the southeastern corner of the state. The county's population was 91,738 at the 2010 census. The county seat is Cheyenne, the state capital... (81,607)

NOTE: Due to Hurricane Katrina

Hurricane Katrina

Hurricane Katrina of the 2005 Atlantic hurricane season was a powerful Atlantic hurricane. It is the costliest natural disaster, as well as one of the five deadliest hurricanes, in the history of the United States. Among recorded Atlantic hurricanes, it was the sixth strongest overall...

, in 2005 East Baton Rouge Parish

East Baton Rouge Parish, Louisiana

East Baton Rouge Parish is a parish located in the U.S. state of Louisiana. The parish seat is Baton Rouge, Louisiana's state capital. As of the 2010 census, the population was 440,171. The parish has a total area of , of which is land and is water. It is the most populous parish in the state...

passed Orleans Parish as the most populous parish in Louisiana

Louisiana

List of States by Average County Area

Ranking of states based on the average area for all counties or equivalents in each state. Taken by dividing the state's total area by the number of counties in the state. See also List of U.S. states by area.

Rank	State name	Mean County Area (sq.mi.)	Mean County Area (km².)
1	Alaska
2	Arizona	7599.87	19683.56
3	Nevada	6503.59	16844.22
4	Wyoming	4252.96	11015.11
5	New Mexico	3684.52	9542.85
6	Utah	2927.55	7582.32
7	California	2822.34	7309.84
8	Oregon	2732.81	7077.93
9	Hawaii	2732.75	7077.79
10	Montana	2625.75	6800.66
11	Maine	2211.56	5727.92
12	Idaho	1899.32	4919.21
13	Washington	1828.21	4735.03
14	Colorado	1626.47	4212.53
15	North Dakota	1333.96	3454.95
16	Michigan	1178.19	3051.51
17	South Dakota	1168.42	3026.20
18	Texas	1057.41	2738.67
19	Minnesota	999.30	2588.17
20	Florida	981.42	2541.86
21	New Hampshire	935.40	2421.64
22	Wisconsin	909.69	2356.10
23	Oklahoma	907.77	2351.10
24	New York	879.94	2279.02
25	Nebraska	831.76	2154.26
26	Delaware	829.67	2148.83
27	Louisiana	810.00	2097.89
28	Kansas	783.59	2029.49
29	Alabama	782.37	2026.34
30	Massachusetts	753.93	1952.67
31	Arkansas	709.05	1836.44
32	South Carolina	696.09	1802.86
33	Connecticut	692.88	1794.54
34	Pennsylvania	687.39	1780.33
35	Vermont	686.71	1778.58
36	Missouri	606.12	1569.85
37	Mississippi	590.61	1529.67
38	Iowa	568.40	1472.16
39	Illinois	567.78	1470.55
40	North Carolina	538.19	1393.91
41	Maryland	516.96	1338.92
42	Ohio	509.38	1319.28
43	Tennessee	443.61	1148.95
44	West Virginia	440.55	1141.01
45	New Jersey	415.29	1075.59
46	Indiana	395.85	1025.24
47	Georgia	373.74	967.99
48	Kentucky	336.74	872.16
49	Virginia	319.21	826.75
50	Rhode Island	242.80	628.85

Fifty most densely populated counties (or county equivalents)

Data presented below is based on U.S. Census department data from 2000. Calculations are made by dividing the population by the land area. All county-equivalents are included. Virginia independent cities

Political subdivisions of Virginia

The political subdivisions of Virginia are the areas into which the Commonwealth of Virginia, a U.S. state, is divided for political and administrative purposes. Some are local governments; others are not...

(IC) appear on the list.

Rank	County name	Pop/km²	Pop/mile²
1	New York County, New York Manhattan Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York... (Manhattan Manhattan Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York... Borough)	25,845.71	66,940.07
2	Kings County, New York Brooklyn Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated... (Brooklyn Brooklyn Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated... Borough)	13,481.39	34,916.64
3	Bronx County, New York The Bronx The Bronx is the northernmost of the five boroughs of New York City. It is also known as Bronx County, the last of the 62 counties of New York State to be incorporated... (The Bronx The Bronx The Bronx is the northernmost of the five boroughs of New York City. It is also known as Bronx County, the last of the 62 counties of New York State to be incorporated... Borough)	12,243.04	31,709.34
4	Queens County, New York Queens Queens is the easternmost of the five boroughs of New York City. The largest borough in area and the second-largest in population, it is coextensive with Queens County, an administrative division of New York state, in the United States.... (Queens Queens Queens is the easternmost of the five boroughs of New York City. The largest borough in area and the second-largest in population, it is coextensive with Queens County, an administrative division of New York state, in the United States.... Borough)	7,879.95	20,408.98
5	City and County of San Francisco, California	6,422.57	16,634.37
6	Hudson County, New Jersey Hudson County, New Jersey Hudson County is the smallest county in New Jersey and one of the most densely populated in United States. It takes its name from the Hudson River, which creates part of its eastern border. Part of the New York metropolitan area, its county seat and largest city is Jersey City.- Municipalities...	5,036.17	13,043.62
7	Suffolk County, Massachusetts Suffolk County, Massachusetts Suffolk County has no land border with Plymouth County to its southeast, but the two counties share a water boundary in the middle of Massachusetts Bay.-National protected areas:*Boston African American National Historic Site...	4,551.51	11,788.35
8	Philadelphia County, Pennsylvania Philadelphia County, Pennsylvania -History:Tribes of Lenape were the first known occupants in the area which became Philadelphia County. The first European settlers were Swedes and Finns who arrived in 1638. The Netherlands seized the area in 1655, but permanently lost control to England in 1674...	4,337.32	11,233.61
9	Washington, D.C. Washington, D.C. Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....	3,597.09	9,316.43
10	City of Alexandria, Virginia Alexandria, Virginia Alexandria is an independent city in the Commonwealth of Virginia. As of 2009, the city had a total population of 139,966. Located along the Western bank of the Potomac River, Alexandria is approximately six miles south of downtown Washington, D.C.Like the rest of northern Virginia, as well as...	3,263.33	8,451.99
11	City of Baltimore, Maryland Baltimore Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore...	3,111.36	8,058.40
12	Richmond County, New York Staten Island Staten Island is a borough of New York City, New York, United States, located in the southwest part of the city. Staten Island is separated from New Jersey by the Arthur Kill and the Kill Van Kull, and from the rest of New York by New York Bay... (Staten Island Staten Island Staten Island is a borough of New York City, New York, United States, located in the southwest part of the city. Staten Island is separated from New Jersey by the Arthur Kill and the Kill Van Kull, and from the rest of New York by New York Bay... Borough)	2,929.69	7,587.86
13	Arlington County, Virginia Arlington County, Virginia Arlington County is a county in the Commonwealth of Virginia. The land that became Arlington was originally donated by Virginia to the United States government to form part of the new federal capital district. On February 27, 1801, the United States Congress organized the area as a subdivision of...	2,827.54	7,323.30
14	Essex County, New Jersey Essex County, New Jersey Essex County is a county located in the northeastern part of the U.S. state of New Jersey. As of the United States 2010 Census, the population was 783,969, ranking it third in the state after Bergen County and Middlesex County; Essex County's population has declined from 786,147 as of the bureau's...	2,426.79	6,285.36
15	Cook County, Illinois Cook County, Illinois Cook County is a county in the U.S. state of Illinois, with its county seat in Chicago. It is the second most populous county in the United States after Los Angeles County. The county has 5,194,675 residents, which is 40.5 percent of all Illinois residents. Cook County's population is larger than...	2,195.21	5,685.58
16	City of Saint Louis, Missouri St. Louis, Missouri St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...	2,171.00	5,622.87
17	City of Falls Church, Virginia Falls Church, Virginia The City of Falls Church is an independent city in Virginia, United States, in the Washington Metropolitan Area. The city population was 12,332 in 2010, up from 10,377 in 2000. Taking its name from The Falls Church, an 18th-century Anglican parish, Falls Church gained township status within...	2,017.69	5,225.79
18	Union County, New Jersey Union County, New Jersey Union County is a county located in the U.S. state of New Jersey. As of the 2010 Census, the population was 536,499. It is part of the New York Metropolitan Area. Its county seat is Elizabeth. Union County ranks 93rd among the highest-income counties in the United States. It also ranks 74th in...	1,953.30	5,059.01
19	Nassau County, New York Nassau County, New York Nassau County is a suburban county on Long Island, east of New York City in the U.S. state of New York, within the New York Metropolitan Area. As of the 2010 census, the population was 1,339,532...	1,797.29	4,654.97
20	City of Charlottesville, Virginia Charlottesville, Virginia Charlottesville is an independent city geographically surrounded by but separate from Albemarle County in the Commonwealth of Virginia, United States, and named after Charlotte of Mecklenburg-Strelitz, the queen consort of King George III of the United Kingdom.The official population estimate for...	1,694.89	4,389.74
21	City of Norfolk, Virginia Norfolk, Virginia Norfolk is an independent city in the Commonwealth of Virginia in the United States. With a population of 242,803 as of the 2010 Census, it is Virginia's second-largest city behind neighboring Virginia Beach....	1,684.47	4,362.76
22	City of Manassas Park, Virginia	1,594.23	4,129.03
23	Milwaukee County, Wisconsin	1,502.73	3,892.06
24	Bergen County, New Jersey Bergen County, New Jersey Bergen County is the most populous county of the state of New Jersey, United States. As of the 2010 United States Census, its population was 905,116. The county is part of the New York City Metropolitan Area. Its county seat is Hackensack...	1,457.74	3,775.52
25	City and County of Denver, Colorado	1,396.45	3,616.78
26	Orange County, California Orange County, California Orange County is a county in the U.S. state of California. Its county seat is Santa Ana. As of the 2010 census, its population was 3,010,232, up from 2,846,293 at the 2000 census, making it the third most populous county in California, behind Los Angeles County and San Diego County...	1,392.14	3,605.62
27	City of Manassas, Virginia Manassas, Virginia The City of Manassas is an independent city surrounded by Prince William County and the independent city of Manassas Park in the Commonwealth of Virginia in the United States. Its population was 37,821 as of 2010. Manassas also surrounds the county seat for Prince William County but that county...	1,365.64	3,536.98
28	City of Fairfax, Virginia Fairfax, Virginia The City of Fairfax is an independent city forming an enclave within the confines of Fairfax County, in the Commonwealth of Virginia in the United States. Although politically independent of the surrounding county, the City is nevertheless the county seat....	1,315.41	3,406.91
29	Wayne County, Michigan Wayne County, Michigan -History:Wayne County was one of the first counties formed when the Northwest Territory was organized. It was named for the American general "Mad Anthony" Wayne. It originally encompassed the entire area of the Lower Peninsula of Michigan, as well as small sections that are now part of northern...	1,295.80	3,356.11
30	City of Richmond, Virginia Richmond, Virginia Richmond is the capital of the Commonwealth of Virginia, in the United States. It is an independent city and not part of any county. Richmond is the center of the Richmond Metropolitan Statistical Area and the Greater Richmond area...	1,271.30	3,292.64
31	Pinellas County, Florida Pinellas County, Florida Pinellas County is a county located in the state of Florida. Its county seat is Clearwater, Florida, and its largest city is St. Petersburg. This county is contained entirely within the telephone area code 727, except for some sections of Oldsmar, which have the area code 813...	1,271.04	3,291.99
32	Ramsey County, Minnesota Ramsey County, Minnesota Ramsey County is a county located in the U.S. state of Minnesota, founded in 1849. As of 2010, the population was 508,640. Its county seat is St. Paul, which is also Minnesota's state capital. The county is named for Alexander Ramsey , the first governor of the Minnesota Territory...	1,266.63	3,280.55
33	Cuyahoga County, Ohio Cuyahoga County, Ohio Cuyahoga County is a county located in the state of Ohio, United States. It is the most populous county in Ohio; as of the 2010 census, the population was 1,280,122. Its county seat is Cleveland. Cuyahoga County is part of Greater Cleveland, a metropolitan area, and Northeast Ohio, a...	1,173.89	3,040.37
34	City of Portsmouth, Virginia Portsmouth, Virginia Portsmouth is located in the Hampton Roads metropolitan area of the U.S. Commonwealth of Virginia. As of 2010, the city had a total population of 95,535.The Norfolk Naval Shipyard, often called the Norfolk Navy Yard, is a historic and active U.S...	1,170.92	3,032.68
35	Delaware County, Pennsylvania Delaware County, Pennsylvania Delaware County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 558,979, making it Pennsylvania's fifth most populous county, behind Philadelphia, Allegheny, Montgomery, and Bucks counties....	1,154.60	2,990.41
36	City of Hampton, Virginia Hampton, Virginia Hampton is an independent city that is not part of any county in Southeast Virginia. Its population is 137,436. As one of the seven major cities that compose the Hampton Roads metropolitan area, it is on the southeastern end of the Virginia Peninsula. Located on the Hampton Roads Beltway, it hosts...	1,091.89	2,827.99
37	City of Lexington, Virginia Lexington, Virginia Lexington is an independent city within the confines of Rockbridge County in the Commonwealth of Virginia. The population was 7,042 in 2010. Lexington is about 55 minutes east of the West Virginia border and is about 50 miles north of Roanoke, Virginia. It was first settled in 1777.It is home to...	1,063.24	2,753.78
38	DuPage County, Illinois DuPage County, Illinois As of the 2010 Census, the population of the county was 916,924, White Americans made up 77.9% of Dupage County's population; non-Hispanic whites represented 70.5% of the population. Black Americans made up 4.6% of the population. Native Americans made up 0.3% of Dupage County's population...	1,046.44	2,710.27
39	Orleans Parish, Louisiana	1,036.43	2,684.34
40	Passaic County, New Jersey Passaic County, New Jersey Passaic County is a county located in the U.S. state of New Jersey. As of the 2010 Census, the population was 501,226. Its county seat is Paterson...	1,019.06	2,639.34
41	City of Newport News, Virginia Newport News, Virginia Newport News is an independent city located in the Hampton Roads metropolitan area of Virginia. It is at the southeastern end of the Virginia Peninsula, on the north shore of the James River extending southeast from Skiffe's Creek along many miles of waterfront to the river's mouth at Newport News...	1,018.48	2,637.85
42	City of Winchester, Virginia Winchester, Virginia Winchester is an independent city located in the northwestern portion of the Commonwealth of Virginia in the USA. The city's population was 26,203 according to the 2010 Census...	975.55	2,526.66
43	Dallas County, Texas Dallas County, Texas As of the census of 2000, there were 2,218,899 people, 807,621 households, and 533,837 families residing in the county. The population density was 2,523 people per square mile . There were 854,119 housing units at an average density of 971/sq mi...	973.99	2,522.63
44	DeKalb County, Georgia DeKalb County, Georgia DeKalb County is a county located in the U.S. state of Georgia. The population of the county was 691,893 at the 2010 census. Its county seat is the city of Decatur. It is bordered to the west by Fulton County and contains roughly 10% of the city of Atlanta...	958.56	2,482.67
45	Fairfax County, Virginia Fairfax County, Virginia Fairfax County is a county in Virginia, in the United States. Per the 2010 Census, the population of the county is 1,081,726, making it the most populous jurisdiction in the Commonwealth of Virginia, with 13.5% of Virginia's population...	947.80	2,454.78
46	Middlesex County, New Jersey Middlesex County, New Jersey -Demographics:As of the census of 2000, there were 750,162 people, 265,815 households, and 190,855 families residing in the county. The population density was 2,422 people per square mile . There were 273,637 housing units at an average density of 884 per square mile...	935.17	2,422.07
47	Los Angeles County, California Los Angeles County, California Los Angeles County is a county in the U.S. state of California. As of 2010 U.S. Census, the county had a population of 9,818,605, making it the most populous county in the United States. Los Angeles County alone is more populous than 42 individual U.S. states...	905.09	2,344.16
48	City of Harrisonburg, Virginia Harrisonburg, Virginia Harrisonburg is an independent city in the Shenandoah Valley region of Virginia in the United States. Its population as of 2010 is 48,914, and at the 2000 census, 40,468. Harrisonburg is the county seat of Rockingham County and the core city of the Harrisonburg, Virginia Metropolitan Statistical...	889.73	2,304.38
49	Camden County, New Jersey Camden County, New Jersey -Demographics:As of the 2010 Census the population of Camden County was 60.28% Non-Hispanic white, 18.45% Non-Hispanic black, 1.12% Hispanic blacks, 0.17% Non-Hispanic Native American, 0.15% Hispanic Native Americans, 5.07% Non-Hispanic Asian, and 0.14% non-Hispanics reporting some other race...	883.95	2,289.41
50	City of Colonial Heights, Virginia Colonial Heights, Virginia Colonial Heights is an independent city in Virginia, United States. The population was 17,411 as of 2010. The Bureau of Economic Analysis combines the City of Colonial Heights with Dinwiddie County for statistical purposes...	872.70	2,260.28

Fifty least densely populated counties (or county equivalents)

Data presented below is based on U.S. Census department data from 2000. Calculations are made by dividing the population by the land area. All county-equivalents are included. The list is dominated by just a few states: Alaska, Montana, and Texas together comprise about two-thirds of the entries. The Unorganized Borough, which comprises all Census Areas (non-governmental entities) of Alaska, is not included here as a unit, but would rank seventh at 0.0957/km² (0.2478/mile²) if its component Census Areas were eliminated from the list.

Rank	County name	Pop/km²	Pop/mile²
1	Yukon-Koyukuk Census Area, Alaska Yukon-Koyukuk Census Area, Alaska Yukon-Koyukuk Census Area is a census area located in the state of Alaska, United States. As of the 2010 census, the population was 5,588. It is part of the unorganized borough and therefore has no borough seat...	0.0173	0.0449
2	Lake and Peninsula Borough, Alaska Lake and Peninsula Borough, Alaska -National protected areas:* Alagnak Wild River* Alaska Maritime National Wildlife Refuge ** Sutwik Island* Alaska Peninsula National Wildlife Refuge * Aniakchak National Monument and Preserve...	0.0296	0.0767
3	North Slope Borough, Alaska North Slope Borough, Alaska -National protected areas:* Alaska Maritime National Wildlife Refuge Cape Lisburne Cape Thompson* Arctic National Wildlife Refuge ** Mollie Beattie Wilderness * Gates of the Arctic National Park and Preserve...	0.0321	0.0831
4	Loving County, Texas Loving County, Texas US Census 2000Of the 67 residents, 60 were White, 6 of "some other race", and 1 person of two or more races. There were 7 residents who were Hispanic or Latino of any race...	0.0384	0.0995
5	Yakutat City and Borough, Alaska Yakutat City and Borough, Alaska Yakutat City and Borough is a unified city-borough in the U.S. state of Alaska. As of the 2010 census, the population was 4035. The name is Tlingit, Yaakwdáat, meaning "the place where canoes rest", but it originally derives from an Eyak name diyaʼqudaʼt and was influenced by the Tlingit word...	0.0408	0.1056
6	Denali Borough, Alaska Denali Borough, Alaska -Demographics:As of the census of 2000, there were 1,893 people, 785 households, and 452 families residing in the borough. The population density was 0 people per square mile . There were 1,351 housing units at an average density of 0 per square mile...	0.0573	0.1485
7	Northwest Arctic Borough, Alaska Northwest Arctic Borough, Alaska -National protected areas:* Alaska Maritime National Wildlife Refuge ** Chamisso Wilderness* Bering Land Bridge National Preserve * Cape Krusenstern National Monument* Gates of the Arctic National Park and Preserve...	0.0775	0.2008
8	Southeast Fairbanks Census Area, Alaska Southeast Fairbanks Census Area, Alaska Southeast Fairbanks Census Area is a census area located in the state of Alaska, United States. As of the 2000 census, the population was 6,174. It is part of the unorganized borough and therefore has no borough seat...	0.0961	0.2488
9	Dillingham Census Area, Alaska Dillingham Census Area, Alaska Dillingham Census Area is a census area located in the state of Alaska, United States. As of the 2000 census, the population was 4,922. It is part of the unorganized borough and therefore has no borough seat...	0.1018	0.2636
10	Esmeralda County, Nevada Esmeralda County, Nevada Esmeralda County is a county in the west of U.S. state of Nevada. Its county seat is Goldfield. Its 2000 census population was officially 971, making its population density 0.1045 inhabitants/km² , the second-lowest of any county-equivalent outside of Alaska. As of 2010, the population had...	0.1045	0.2706
11	Garfield County, Montana Garfield County, Montana -Politics:Garfield County is a solidly Republican county. It might be the most Republican county in Montana and one of the most Republican in the nation....	0.1058	0.2740
12	Kenedy County, Texas	0.1097	0.2842
13	Valdez-Cordova Census Area, Alaska Valdez-Cordova Census Area, Alaska Valdez-Cordova Census Area is a census area located in the state of Alaska, United States. As of the 2000 census, the population was 10,195. It is part of the unorganized borough and therefore has no borough seat...	0.1147	0.2971
14	Petroleum County, Montana Petroleum County, Montana -National protected areas:Charles M. Russell National Wildlife Refuge War Horse National Wildlife Refuge-Demographics:At the 2000 census, there were 493 people, 211 households and 136 families residing in the county. The population density was 0.29 per square mile . There were 292 housing units...	0.1151	0.2981
15	Harding County, New Mexico Harding County, New Mexico Harding County is a county located in the U.S. state of New Mexico. As of 2010, the population was 695, the lowest in the state. Its county seat is the Village of Mosquero. The county is named for United States President Warren G...	0.1471	0.3811
16	Aleutians East Borough, Alaska Aleutians East Borough, Alaska - See also :List of airports in the Aleutians East BoroughNational Register of Historic Places listings in Aleutians East Borough, Alaska-External links:*-References:...	0.1490	0.3859
17	King County, Texas	0.1507	0.3902
18	Lincoln County, Nevada Lincoln County, Nevada Lincoln County is a county located in the U.S. state of Nevada. As of the 2000 census, the population was 4,165. Its county seat is Pioche.-History:...	0.1512	0.3917
19	Bethel Census Area, Alaska Bethel Census Area, Alaska Bethel Census Area is a census area located in the U.S. state of Alaska. As of 2000, the population is 16,006. It is part of the unorganized borough and therefore has no borough seat...	0.1521	0.3939
20	Eureka County, Nevada Eureka County, Nevada Eureka County is a county located in the U.S. state of Nevada. As of the 2000 census, the population was 1,651. Its county seat is Eureka.Eureka County is part of the Elko Micropolitan Statistical Area.-History:...	0.1527	0.3954
21	Nome Census Area, Alaska Nome Census Area, Alaska Nome Census Area is a census area located in the state of Alaska, United States. As of the 2000 census, the population was 9,196. It is part of the unorganized borough and therefore has no borough seat. Its largest community by far is the city of Nome....	0.1544	0.3998
22	Carter County, Montana Carter County, Montana -Demographics:As of the census of 2000, there were 1,360 people, 543 households, and 382 families residing in the county. The population density was -Demographics:...	0.1572	0.4072
23	Wade Hampton Census Area, Alaska Wade Hampton Census Area, Alaska Wade Hampton Census Area is a census area located in the U.S. state of Alaska. As of the 2000 census, the population was 7,028. It is part of the unorganized borough and therefore has no borough seat...	0.1578	0.4088
24	Skagway-Hoonah-Angoon Census Area, Alaska Skagway-Hoonah-Angoon Census Area, Alaska Hoonah-Angoon Census Area is a census area located in the state of Alaska, United States. As of the 2000 census, the population was 2,574. It is part of the unorganized borough and therefore has no borough seat. Its largest community is the city of Hoonah...	0.1680	0.4351
25	Terrell County, Texas Terrell County, Texas Terrell County is a county located in the U.S. state of Texas. It is one of the nine counties that comprise the Trans-Pecos region of West Texas. In 2000, its population was 1,081. Its county seat is Sanderson. The county was named for Alexander W. Terrell, a Texas state senator...	0.1770	0.4585
26	Harding County, South Dakota Harding County, South Dakota As of the census of 2000, there were 1,353 people, 525 households, and 352 families residing in the county. The population density was 0.5 people per square mile . There were 804 housing units at an average density of 0.3 per square mile...	0.1956	0.5066
27	Catron County, New Mexico Catron County, New Mexico -2010:Whereas according to the 2010 U.S. Census Bureau:89.8% White0.4% Black2.7% Native American0.2% Asian0.0% Native Hawaiian or Pacific Islander3.1% Two or more races3.7% Other races19.0% Hispanic or Latino -2000:...	0.1975	0.5114
28	Powder River County, Montana Powder River County, Montana -Demographics:As of the census of 2000, there were 1,858 people, 737 households, and 524 families residing in the county. The population density was -Demographics:...	0.2176	0.5635
29	Clark County, Idaho Clark County, Idaho Clark County is a rural county located in the U.S. state of Idaho. As of the 2000 Census the county had a population of 1,022 . The county seat and largest city is Dubois...	0.2236	0.5792
30	McPherson County, Nebraska McPherson County, Nebraska -History:McPherson County was formed in 1887. It was named after Union General James B. McPherson.-Demographics:As of the census of 2000, there were 533 people, 202 households, and 157 families residing in the county. The population density was 1 people per square mile . There were 283 housing...	0.2396	0.6205
31	Arthur County, Nebraska Arthur County, Nebraska -Demographics:As of the census of 2000, there were 444 people, 185 households, and 138 families residing in the county. The population density was 0.618 people per square mile . There were 273 housing units at an average density of 0.380 per square mile...	0.2396	0.6207
32	Slope County, North Dakota Slope County, North Dakota There were 313 households out of which 30.0% had children under the age of 18 living with them, 64.5% were married couples living together, 3.8% had a female householder with no husband present, and 28.8% were non-families. 27.2% of all households were made up of individuals and 10.5% had someone...	0.2431	0.6298
33	Prairie County, Montana Prairie County, Montana -Demographics:As of the census of 2000, there were 1,199 people, 537 households, and 354 families residing in the county. The population density was -Demographics:...	0.2666	0.6904
34	Hinsdale County, Colorado Hinsdale County, Colorado Hinsdale County is the least densely populated of the 64 counties of the State of Colorado of the United States. The county population was 790 at U.S. Census 2000. The county seat and the only municipality in the county is the Town of Lake City. Hinsdale County is named for George A. Hinsdale, a...	0.2729	0.7068
35	Sioux County, Nebraska Sioux County, Nebraska -National protected areas:* Agate Fossil Beds National Monument* Nebraska National Forest * Oglala National Grassland -Demographics:...	0.2756	0.7137
36	Hudspeth County, Texas Hudspeth County, Texas Hudspeth County is a county located in the U.S. state of Texas. It is one of the nine counties that comprise the Trans-Pecos region of West Texas. As of 2000, the population was 3,344. By 2010, the population had increased to 3,476. Its county seat is Sierra Blanca. The largest city is Fort Hancock...	0.2825	0.7316
37	McCone County, Montana McCone County, Montana -Demographics:As of the census of 2000, there were 1,977 people, 810 households, and 596 families residing in the county. The population density was 1 people per square mile . There were 1,087 housing units at an average density of 0 per square mile...	0.2889	0.7481
38	Harney County, Oregon Harney County, Oregon -National protected areas:Malheur National Forest Malheur National Wildlife Refuge*Ochoco National Forest -Demographics:As of the census of 2000, there were 7,609 people, 3,036 households, and 2,094 families residing in the county. The population density was 1 people per square mile...	0.2899	0.7508
39	McMullen County, Texas	0.2952	0.7646
40	Billings County, North Dakota Billings County, North Dakota -National protected areas:* Little Missouri National Grassland * Theodore Roosevelt National Park -Demographics:As of the census of 2000, there were 888 people, 366 households, and 255 families residing in the county. The population density was 0.79 people per square mile . There were 529 housing...	0.2978	0.7712
41	Culberson County, Texas Culberson County, Texas Culberson County is a county located in the U.S. state of Texas. It is one of the nine counties that comprise the Trans-Pecos region of West Texas. In 2000, its population was 2,975. Culberson was founded in 1911. It is named for David B. Culberson, a lawyer and Confederate soldier in the American...	0.3013	0.7803
42	Meagher County, Montana Meagher County, Montana -National protected areas:Gallatin National Forest Helena National Forest *Lewis and Clark National Forest -Demographics:As of the census of 2000, there were 1,932 people, 803 households, and 529 families residing in the county...	0.3119	0.8078
43	Borden County, Texas Borden County, Texas Borden County is a rural county located in the U.S. state of Texas. In 2000, its population was 729. Its county seat is Gail. Gail and Borden County are named for Gail Borden, Jr., businessman, publisher, surveyor, and inventor of condensed milk...	0.3132	0.8111
44	Blaine County, Nebraska Blaine County, Nebraska -History:Blaine County was formed in 1885. It was named after presidential candidate James G. Blaine.-Demographics:As of the census of 2000, there were 583 people, 238 households, and 168 families residing in the county. The population density was 1 people per square mile . There were 333 housing...	0.3167	0.8203
45	Prince of Wales-Outer Ketchikan Census Area, Alaska Prince of Wales-Outer Ketchikan Census Area, Alaska Prince of Wales-Hyder Census Area is a census area located in the U.S. state of Alaska. It is part of the unorganized borough and therefore has no borough seat. Its largest communities are Craig and Metlakatla...	0.3232	0.8294
46	Treasure County, Montana Treasure County, Montana - Demographics :As of the census of 2000, there were 861 people, 357 households, and 242 families residing in the county. The population density was - Demographics :...	0.3396	0.8796
47	Custer County, Idaho Custer County, Idaho Custer County is a rural mountain county located in the center of the U.S. state of Idaho. Established in 1881, it was named for the General Custer Mine, where gold was discovered five years earlier . The population was 4,342 at the 2000 census; it is estimated to have fallen to 4,166 by 2007...	0.3404	0.8815
48	Golden Valley County, Montana Golden Valley County, Montana -Demographics:As of the census of 2000, there were 1,042 people, 365 households, and 263 families residing in the county. The population density was -Demographics:...	0.3423	0.8866
49	Phillips County, Montana Phillips County, Montana -National protected areas:* Bowdoin National Wildlife Refuge* Charles M. Russell National Wildlife Refuge * Hewitt Lake National Wildlife Refuge* UL Bend National Wildlife Refuge* Upper Missouri River Breaks National Monument -Demographics:...	0.3456	0.8952
50	Wheeler County, Oregon Wheeler County, Oregon As of the census of 2000, there were 1,547 people, 653 households, and 444 families residing in the county. The population density was 1 people per square mile . There were 842 housing units at an average density of 0 per square mile...	0.3483	0.9021

Least and most densely populated counties of each state

Data presented below is based on U.S. Census Bureau data from 2000. Calculations are made by dividing the population by the land area. Density is given both in population per km² and per square mile. All county-equivalents are included.

County name coincidences: Garfield County is the least densely populated county in both Montana and Utah. Harding County is the least densely populated in both New Mexico and South Dakota. Jefferson County is the most densely populated in both Alabama and Kentucky.

If Census Areas of Alaska are omitted, Lake and Peninsula Borough

Lake and Peninsula Borough, Alaska

-National protected areas:* Alagnak Wild River* Alaska Maritime National Wildlife Refuge ** Sutwik Island* Alaska Peninsula National Wildlife Refuge * Aniakchak National Monument and Preserve...

becomes the least densely populated at 0.0296/km² | 0.0767/sq mi.

	Least densely populated	Most densely populated
All States	Yukon-Koyukuk Census Area, Alaska Yukon-Koyukuk Census Area, Alaska Yukon-Koyukuk Census Area is a census area located in the state of Alaska, United States. As of the 2010 census, the population was 5,588. It is part of the unorganized borough and therefore has no borough seat... (0.0173/km² \| 0.0449/sq mi)	New York County, New York Manhattan Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York... (25,845.71/km² \| 66,940.07/sq mi)
Alabama	Wilcox County Wilcox County, Alabama Wilcox County is a county of the U.S. state of Alabama. Its name is in honor of Lieutenant J. M. Wilcox, who fought in the wars against the Creek tribe. As of 2010, the population was 11,670... (5.7276/km² > 14.8343/sq mi)	Jefferson County Jefferson County, Alabama Jefferson County is the most populous county in the U.S. state of Alabama, with its county seat being located in Birmingham.As of the 2010 U.S. Census, the population of Jefferson County was 658,466... (229.75/km² > 595.04/sq mi)
Alaska	Yukon-Koyukuk Census Area Yukon-Koyukuk Census Area, Alaska Yukon-Koyukuk Census Area is a census area located in the state of Alaska, United States. As of the 2010 census, the population was 5,588. It is part of the unorganized borough and therefore has no borough seat... (0.0173/km² > 0.0449/sq mi)	Municipality of Anchorage Anchorage, Alaska Anchorage is a unified home rule municipality in the southcentral part of the U.S. state of Alaska. It is the northernmost major city in the United States... (59.21/km² > 153.36)
Arizona	La Paz County La Paz County, Arizona La Paz County is a county in the western part of the U.S. state of Arizona. As of the 2010 census its population was 20,489. The county seat is Parker... (1.6916/km² > 4.3812/sq mi)	Maricopa County Maricopa County, Arizona -2010:Whereas according to the 2010 U.S. Census Bureau:73.0% White5.0% Black2.1% Native American3.5% Asian0.2% Native Hawaiian or Pacific Islander3.5% Two or more races12.7% Other races29.6% Hispanic or Latino -2000:... (128.8868/km² > 333.82/sq mi)
Arkansas	Calhoun County (3.5299/km² > 9.1425/sq mi)	Pulaski County (181.06/km² > 468.95/sq mi)
California	Alpine County Alpine County, California Alpine County is the smallest county, by population, in the U.S. state of California. As of 2010, it had a population of 1,175, all rural. There are no incorporated cities in the county. The county seat is Markleeville... (0.6315/km² > 1.6355/sq mi)	2 > 16,634.37/sq mi)
Colorado	Hinsdale County Hinsdale County, Colorado Hinsdale County is the least densely populated of the 64 counties of the State of Colorado of the United States. The county population was 790 at U.S. Census 2000. The county seat and the only municipality in the county is the Town of Lake City. Hinsdale County is named for George A. Hinsdale, a... (0.2729/km² > 0.7068/sq mi)	2 > 3,616.78/sq mi)
Connecticut	Litchfield County Litchfield County, Connecticut Litchfield County is a county located in the northwestern corner of the U.S. state of Connecticut. Litchfield County has the lowest population density of any county in Connecticut but is geographically the state's largest county. As of 2010 the population was 189,927... (76.4686/km² > 198.0527/sq mi)	Fairfield County Fairfield County, Connecticut Fairfield County is a county located in the southwestern corner of the U.S. state of Connecticut. The county population is 916,829 according to the 2010 Census. There are currently 1,465 people per square mile in the county. It is the most populous county in the State of Connecticut and contains... (544.52/km² > 1,410.30/sq mi)
Delaware	Sussex County Sussex County, Delaware Sussex County is a county located in the southern part of the U.S. state of Delaware. As of 2010 the population was 197,145, an increase of 25.9% over the previous decade. The county seat is Georgetown. The Seaford Micropolitan Statistical Area includes all of Sussex County.Sussex County is... (64.5049/km² > 167.0668/sq mi)	New Castle County New Castle County, Delaware New Castle County is the northernmost of the three counties of the U.S. state of Delaware. As of 2010 its population was 538,479, an increase of 7.6% over the previous decade. The county seat is Wilmington. The center of population of Delaware is located in New Castle County, in the town of... (453.13/km² > 1,173.60/sq mi)
District of Columbia	Washington, D.C. Washington, D.C. Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution.... (3,597.09/km² \| 9,316.43/sq mi)
Florida	Liberty County Liberty County, Florida Liberty County is a county located in the state of Florida. Its population was estimated in 2005 as 7,733. Its most populous incorporated area and county seat is Bristol.... (3.2431/km² > 8.3997/sq mi)	Pinellas County Pinellas County, Florida Pinellas County is a county located in the state of Florida. Its county seat is Clearwater, Florida, and its largest city is St. Petersburg. This county is contained entirely within the telephone area code 727, except for some sections of Oldsmar, which have the area code 813... (1,271.04/km² > 3,291.99/sq mi)
Georgia	Clinch County Clinch County, Georgia Clinch County is a county located in the U.S. state of Georgia. It was created on February 14, 1850, named in honor of Duncan Lamont Clinch. As of 2000, the population is 6,878. The 2007 Census Estimate shows a population of 6,992... (3.2814/km² > 8.4988/sq mi)	DeKalb County DeKalb County, Georgia DeKalb County is a county located in the U.S. state of Georgia. The population of the county was 691,893 at the 2010 census. Its county seat is the city of Decatur. It is bordered to the west by Fulton County and contains roughly 10% of the city of Atlanta... (958.56/km² > 2,482.67/sq mi)
Hawaii	Kalawao County Kalawao County, Hawaii -Demographics:As of the census of 2000, there were 147 people, 115 households, and 21 families residing in the county. The population density was 11 people per square mile . There were 172 housing units at an average density of 13 per square mile... (4.2980/km² > 11.1318/sq mi)	Honolulu County Honolulu County, Hawaii The City and County of Honolulu is a consolidated city–county located in the U.S. state of Hawaii. The municipality and county includes both the urban district of Honolulu and the rest of the island of Oahu, as well as several minor outlying islands, including all of the Northwestern Hawaiian... (564.03/km² > 1,460.83/sq mi)
Idaho	Clark County Clark County, Idaho Clark County is a rural county located in the U.S. state of Idaho. As of the 2000 Census the county had a population of 1,022 . The county seat and largest city is Dubois... (0.2236/km² > 0.5792/sq mi)	Ada County Ada County, Idaho Ada County is a county in the southwestern part of the U.S. state of Idaho. As of the 2010 Census, the county had a population of 392,365. The county seat and largest city is Boise, which is also the state capital. Other cities in the county with over 10,000 residents include Meridian, Eagle,... (110.12/km² > 285.22/sq mi)
Illinois	Pope County (4.5943/km² > 11.8993/sq mi)	Cook County Cook County, Illinois Cook County is a county in the U.S. state of Illinois, with its county seat in Chicago. It is the second most populous county in the United States after Los Angeles County. The county has 5,194,675 residents, which is 40.5 percent of all Illinois residents. Cook County's population is larger than... (2,195.51/km² > 5,685.58/sq mi)
Indiana	Warren County Warren County, Indiana Warren County lies in western Indiana between the Illinois border and the Wabash River in the United States. Before the arrival of non-indigenous settlers in the early 19th century, the area was inhabited by several Native American tribes. The county was officially established in 1827 and... (8.9086/km² > 23.0732/sq mi)	Marion County Marion County, Indiana Marion County is a county located in the U.S. state of Indiana. Census 2010 recorded a population of 903,393, making it the largest county in the state and 55th most populated county in the country, greater than the population of six states. The county seat is Indianapolis, the state capital and... (838.42/km² > 2,171.50/sq mi)
Iowa	Ringgold County Ringgold County, Iowa -2010 census:The 2010 census recorded a population of 5,131 in the county, with a population density of . There were 2,613 housing units, of which 2,047 were occupied.-2000 census:... (3.9273/km² > 10.1717/sq mi)	Polk County Polk County, Iowa Polk County is a county located in the U.S. state of Iowa. The population was 430,640 in the 2010 census, an increase from 374,601 in the 2000 census. The county seat is Des Moines, which is also the capital city of Iowa... (254.04/km² > 657.95/sq mi)
Kansas	Wallace County Wallace County, Kansas Wallace County is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 1,485. It has the second lowest population of any county in Kansas. Greeley County has the lowest. Its county seat is Sharon Springs. It was created in 1868 and named in honor of... (0.7388/km² > 1.9136/sq mi)	Wyandotte County Wyandotte County, Kansas Wyandotte County is a county located in northeast Kansas, in the Central United States. The county's population was 157,505 for the 2010 census. Its county seat and most populous city is Kansas City with which it shares a unified government... (402.66/km² > 1,042.88/sq mi)
Kentucky	Hickman County Hickman County, Kentucky Hickman County is a county located in the U.S. state of Kentucky. It was formed in 1822. The elevation in the county ranges from to above sea level. As of 2000, the population was 5,262. Its county seat is Clinton. It is the least densely populated county in the state and is a prohibition or... (8.3114/km² > 21.5263/sq mi)	Jefferson County Jefferson County, Kentucky As of the census of 2000, there were 693,604 people, 287,012 households, and 183,113 families residing in the county. The population density was . There were 305,835 housing units at an average density of... (695.43/km² > 1,801.16/sq mi)
Louisiana	Cameron Parish Cameron Parish, Louisiana Cameron Parish is the parish with the most land area in the U.S. state of Louisiana. The parish seat is Cameron and as of 2010, the population was 6,839... (2.9380/km² > 7.6095/sq mi)	2 > 2,684.34/sq mi)
Maine	Piscataquis County Piscataquis County, Maine Piscataquis County is a county located in the U.S. state of Maine. In 2010, its population was 17,535, making it Maine's least-populous county. Its county seat is Dover-Foxcroft.... (1.6778/km² > 4.3454/sq mi)	Cumberland County Cumberland County, Maine Cumberland County is a county located in the U.S. state of Maine. As of 2010, the population was 281,674. Its county seat is Portland, and is the most populous of the sixteen Maine counties, as well as the most affluent. Cumberland County has the deepest and second largest body of water in the... (122.74/km² > 317.90/sq mi)
Maryland	Garrett County Garrett County, Maryland Garrett County is the westernmost county of the U.S. state of Maryland. Created from Allegany County, Maryland in 1872 it was the last Maryland county to be formed. It was named for John Work Garrett , railroad executive, industrialist, and financier. Garrett served as president of the Baltimore... (17.7846/km² > 46.0618/sq mi)	City of Baltimore Baltimore Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore... (independent city) (3,111.36/km² > 8,058.40/sq mi)
Massachusetts	Franklin County Franklin County, Massachusetts -Demographics:As of the census of 2000, there were 71,535 people, 29,466 households, and 18,416 families residing in the county. The population density was 102 people per square mile . There were 31,939 housing units at an average density of 46 per square mile... (39.3429/km² > 101.8976/sq mi)	Suffolk County Suffolk County, Massachusetts Suffolk County has no land border with Plymouth County to its southeast, but the two counties share a water boundary in the middle of Massachusetts Bay.-National protected areas:*Boston African American National Historic Site... (4,551.51/km² > 11,788.35/sq mi)
Michigan	Keweenaw County Keweenaw County, Michigan -Demographics:As of the census of 2000, there were 2,301 people, 998 households, and 604 families residing in the county. The population density was 4 people per square mile . There were 2,327 housing units at an average density of 4 per square mile... (1.6423/km² > 4.2534/sq mi)	Wayne County Wayne County, Michigan -History:Wayne County was one of the first counties formed when the Northwest Territory was organized. It was named for the American general "Mad Anthony" Wayne. It originally encompassed the entire area of the Lower Peninsula of Michigan, as well as small sections that are now part of northern... (1,295.80/km² > 3,356.11/sq mi)
Minnesota	Lake of the Woods County Lake of the Woods County, Minnesota Lake of the Woods County is a county located in the U.S. state of Minnesota. As of 2010, the population was 4,045. Its county seat is Baudette. The county contains the Northwest Angle, the northernmost point of the Lower 48 States, and includes the U.S. portion of Lake of the Woods, shared with... (1.3465/km² > 3.4873/sq mi)	Ramsey County Ramsey County, Minnesota Ramsey County is a county located in the U.S. state of Minnesota, founded in 1849. As of 2010, the population was 508,640. Its county seat is St. Paul, which is also Minnesota's state capital. The county is named for Alexander Ramsey , the first governor of the Minnesota Territory... (1,266.63/km² > 3,280.55/sq mi)
Mississippi	Issaquena County Issaquena County, Mississippi -Demographics:As of the census of 2000, there were 2,274 people, 726 households, and 509 families residing in the county. The population density was 5.15 people per square mile . There were 877 housing units at an average density of 2 per square mile... (2.1256/km² > 5.5052/sq mi)	Harrison County Harrison County, Mississippi -National protected areas:* De Soto National Forest * Gulf Islands National Seashore - Demographics :As of the census of 2000, there were 189,601 people, 71,538 households, and 48,574 families residing in the county. The population density was 326 people per square mile . There were 79,636 housing... (126.00/km² > 326.35/sq mi)
Missouri	Reynolds County Reynolds County, Missouri Reynolds County is a county located in the northwestern portion of the Ozark Foothills Region in Southeast Missouri in the United States. As of the 2000 U.S. Census, the county's population was 6,689. A 2008 estimate, however, showed the population to be 6,388. Its county seat is Centerville... (3.1837/km² > 8.2458/sq mi)	City of St. Louis St. Louis, Missouri St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St... (independent city) (2,171.00/km² > 5,622.87/sq mi)
Montana	Garfield County Garfield County, Montana -Politics:Garfield County is a solidly Republican county. It might be the most Republican county in Montana and one of the most Republican in the nation.... (0.1058/km² > 0.2740/sq mi)	Yellowstone County Yellowstone County, Montana -National protected areas:* Nez Perce National Historical Park * Pompeys Pillar National Monument-Demographics:As of the census of 2000, there were 129,352 people, 52,084 households, and 34,219 families residing in the county. The population density was 49 people per square mile . There were... (18.95/km² > 49.09/sq mi)
Nebraska	McPherson County McPherson County, Nebraska -History:McPherson County was formed in 1887. It was named after Union General James B. McPherson.-Demographics:As of the census of 2000, there were 533 people, 202 households, and 157 families residing in the county. The population density was 1 people per square mile . There were 283 housing... (0.2396/km² > 0.6205/sq mi)	Douglas County Douglas County, Nebraska -Demographics:As of the census of 2000, there were 463,585 people, 182,194 households, and 115,146 families residing in the county. The population density was 1,401 people per square mile . There were 192,672 housing units at an average density of 582 per square mile... (540.79/km² > 1,400.65/sq mi)
Nevada	Esmeralda County Esmeralda County, Nevada Esmeralda County is a county in the west of U.S. state of Nevada. Its county seat is Goldfield. Its 2000 census population was officially 971, making its population density 0.1045 inhabitants/km² , the second-lowest of any county-equivalent outside of Alaska. As of 2010, the population had... (0.1045/km² > 0.2706/sq mi)	Carson City Carson City, Nevada The Consolidated Municipality of Carson City is the capital of the state of Nevada. The words Consolidated Municipality refer to a series of changes in 1969 which abolished Ormsby County and merged all the settlements contained within its borders into Carson City. Since that time Carson City has... (independent city) (141.28/km² > 365.93/sq mi)
New Hampshire	Coos County Coos County, New Hampshire -National protected areas:Umbagog National Wildlife Refuge Silvio O. Conte National Fish and Wildlife Refuge *White Mountain National Forest -Demographics:... (7.1008/km² > 18.3911/sq mi)	Hillsborough County Hillsborough County, New Hampshire -Demographics:As of the census of 2000, there were 380,841 people, 144,455 households, and 98,807 families residing in the county. The population density was 435 people per square mile . There were 149,961 housing units at an average density of 171 per square mile... (167.79/km² > 434.57/sq mi)
New Jersey	Salem County Salem County, New Jersey -Demographics:As of the census of 2000, there were 64,285 people, 24,295 households, and 17,370 families residing in the county. The population density was 190 people per square mile . There were 26,158 housing units at an average density of 77 per square mile... (73.4597/km² > 190.2599/sq mi)	Hudson County Hudson County, New Jersey Hudson County is the smallest county in New Jersey and one of the most densely populated in United States. It takes its name from the Hudson River, which creates part of its eastern border. Part of the New York metropolitan area, its county seat and largest city is Jersey City.- Municipalities... (5,036.17/km² > 13,043.62/sq mi)
New Mexico	Harding County Harding County, New Mexico Harding County is a county located in the U.S. state of New Mexico. As of 2010, the population was 695, the lowest in the state. Its county seat is the Village of Mosquero. The county is named for United States President Warren G... (0.1471/km² > 0.3811/sq mi)	Bernalillo County Bernalillo County, New Mexico -2010:Whereas according to the 2010 U.S. Census Bureau:69.4% White3.0% Black4.8% Native American2.3% Asian0.1% Native Hawaiian or Pacific Islander4.4% Two or more races16.0% Other races47.9% Hispanic or Latino -2000:... (209.755/km² >543.138 /sq mi)
New York	Hamilton County Hamilton County, New York Hamilton County is a county located in the U.S. state of New York. It is named after Alexander Hamilton, the only member of the New York State delegation who signed the United States Constitution in 1787 and later the first United States Secretary of the Treasury. Its county seat is Lake Pleasant... (1.2072/km² > 3.1266/sq mi)	New York County Manhattan Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York... (25,845.71/km² > 66,940.07/sq mi)
North Carolina	Hyde County Hyde County, North Carolina -National protected areas:* Alligator River National Wildlife Refuge * Cape Hatteras National Seashore * Mattamuskeet National Wildlife Refuge* Pocosin Lakes National Wildlife Refuge * Swanquarter National Wildlife Refuge-Demographics:... (3.6708/km² > 9.5073/sq mi)	Mecklenburg County Mecklenburg County, North Carolina -Air:The county's primary commercial aviation airport is Charlotte Douglas International Airport in Charlotte.- Intercity rail :With twenty-five freight trains a day, Mecklenburg is a freight railroad transportation center, largely due to its place on the NS main line between Washington and Atlanta... (510.22/km² > 1,321.47/sq mi)
North Dakota	Slope County Slope County, North Dakota There were 313 households out of which 30.0% had children under the age of 18 living with them, 64.5% were married couples living together, 3.8% had a female householder with no husband present, and 28.8% were non-families. 27.2% of all households were made up of individuals and 10.5% had someone... (0.2431/km² > 0.6298/sq mi)	Cass County Cass County, North Dakota -Demographics:As of the census of 2000, there were 123,138 people, 51,315 households, and 29,814 families residing in the county. The population density was 70 people per square mile . There were 53,790 housing units at an average density of 30 per square mile... (26.93/km² > 69.76/sq mi)
Ohio	Vinton County Vinton County, Ohio Vinton County is a county located in the state of Ohio, United States. As of the 2010 census, the population was 13,435. , the least populous in the state. Its county seat is McArthur. The county is named for Samuel Finley Vinton, a 19th-century United States Congressman from... (11.9407/km² > 30.9264/sq mi)	Cuyahoga County Cuyahoga County, Ohio Cuyahoga County is a county located in the state of Ohio, United States. It is the most populous county in Ohio; as of the 2010 census, the population was 1,280,122. Its county seat is Cleveland. Cuyahoga County is part of Greater Cleveland, a metropolitan area, and Northeast Ohio, a... (1,173.89/km² > 3,040.37/sq mi)
Oklahoma	Cimarron County Cimarron County, Oklahoma Cimarron County is a county located in the U.S. state of Oklahoma. Throughout most of its history it has had the smallest population and the lowest population density of any county in Oklahoma. As of 2010 census, the population was 2,475... (0.6624/km² > 1.7155/sq mi)	Tulsa County Tulsa County, Oklahoma Tulsa County is a county located in the U.S. state of Oklahoma. According to the 2010 U.S. Census, the population is 603,403. Its county seat is Tulsa.-History of Tulsa County:The history of Tulsa County greatly overlaps the history of the city of Tulsa... (381.36/km² > 987.72/sq mi)
Oregon	Harney County Harney County, Oregon -National protected areas:Malheur National Forest Malheur National Wildlife Refuge*Ochoco National Forest -Demographics:As of the census of 2000, there were 7,609 people, 3,036 households, and 2,094 families residing in the county. The population density was 1 people per square mile... (0.2899/km² > 0.7508/sq mi)	Multnomah County Multnomah County, Oregon Multnomah County is one of 36 counties in the U.S. state of Oregon. Though smallest in area, it is the most populous as its county seat, Portland, is the state's largest city... (585.93/km² > 1,517.55/sq mi)
Pennsylvania	Forest County Forest County, Pennsylvania Forest County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 7,716. Forest County is famous as a rural retreat. Nearly 75% of all dwellings in the county are second or vacation homes . Forest County does not have a single traffic light, the only county in the... (4.4606/km² > 11.5529/sq mi)	Philadelphia County Philadelphia County, Pennsylvania -History:Tribes of Lenape were the first known occupants in the area which became Philadelphia County. The first European settlers were Swedes and Finns who arrived in 1638. The Netherlands seized the area in 1655, but permanently lost control to England in 1674... (4,337.32/km² > 11,233.61/sq mi)
Rhode Island	Washington County Washington County, Rhode Island Washington County, commonly known colloquially as South County, is a county located in the southwestern part of the U.S. state of Rhode Island. Washington County borders Kent County to the north, New London County in Connecticut to the west, Suffolk County in New York to the southwest, the Atlantic... (143.3532/km² > 371.2830/sq mi)	Bristol County Bristol County, Rhode Island The border with Bristol County, Massachusetts is rather unusual since the counties both share the same name. The only other instances in which two neighboring counties with the same name share a state border are Sabine County, Texas and Sabine Parish, Louisiana, Union Parish, Louisiana and Union... (792.22/km² > 2,051.84/sq mi)
South Carolina	Allendale County Allendale County, South Carolina -Demographics:As of the census of 2000, there were 11,211 people, 3,915 households and 2,615 families residing in the county. The population density was 28 people per square mile . There were 4,568 housing units at an average density of 11 per square mile... (10.6041/km² > 27.4645/sq mi)	Greenville County Greenville County, South Carolina - External Links :*... (185.51/km² > 480.48/sq mi)
South Dakota	Harding County Harding County, South Dakota As of the census of 2000, there were 1,353 people, 525 households, and 352 families residing in the county. The population density was 0.5 people per square mile . There were 804 housing units at an average density of 0.3 per square mile... (0.1956/km² > 0.5066/sq mi)	Minnehaha County Minnehaha County, South Dakota As of the census of 2000, there were 148,281 people, 57,996 households, and 37,581 families residing in the county. The population density was 183 people per square mile . There were 60,237 housing units at an average density of 74 per square mile... (70.71/km² > 183.14/sq mi)
Tennessee	Perry County (7.1014/km² > 18.3926/sq mi)	Shelby County Shelby County, Tennessee Shelby County is a county located in the U.S. state of Tennessee. It is the state's largest both in terms of population and geographic area, with a population of 927,644 at the 2010 census... (459.25/km² > 1,189.44/sq mi)
Texas	Loving County Loving County, Texas US Census 2000Of the 67 residents, 60 were White, 6 of "some other race", and 1 person of two or more races. There were 7 residents who were Hispanic or Latino of any race... (0.0384/km² > 0.0995/sq mi)	Dallas County Dallas County, Texas As of the census of 2000, there were 2,218,899 people, 807,621 households, and 533,837 families residing in the county. The population density was 2,523 people per square mile . There were 854,119 housing units at an average density of 971/sq mi... (973.99/km² > 2,522.63/sq mi)
Utah	Garfield County Garfield County, Utah Garfield County is a county located in the U.S. state of Utah. As of 2000 the population was 4,735. It was named for James A. Garfield, President of the United States in 1881. Its county seat and largest city is Panguitch.-Geography:... (0.3533/km² > 0.9151/sq mi)	Salt Lake County Salt Lake County, Utah Salt Lake County is a county located in the U.S. state of Utah. It had a population of 1,029,655 at the 2010 census. Its county seat and largest city is Salt Lake City, the state capital. It occupies Salt Lake Valley, as well as parts of the surrounding mountains, the Oquirrh Mountains to the west... (470.41/km² > 1,218.35/sq mi)
Vermont	Essex County Essex County, Vermont Essex County is the county located in the northeastern part of the U.S. state of Vermont. As of 2010, the population was 6,306, making it the least-populous county in both Vermont and New England... (3.7490/km² > 9.7099/sq mi)	Chittenden County Chittenden County, Vermont Chittenden County is a county located in the U.S. state of Vermont. As of 2010, the population was 156,545. Its shire town is Burlington. Chittenden is the most populous county in the state, with more than twice as many residents as Vermont's second-most populous county, Rutland.Chittenden County... (104.99/km² > 271.91/sq mi)
Virginia	Highland County Highland County, Virginia As of the census of 2000, there were 2,536 people, 1,131 households, and 764 families residing in the county. The population density was 6 people per square mile . There were 1,822 housing units at an average density of 4 per square mile... (2.3545/km² > 6.0983/sq mi)	City of Alexandria Alexandria, Virginia Alexandria is an independent city in the Commonwealth of Virginia. As of 2009, the city had a total population of 139,966. Located along the Western bank of the Potomac River, Alexandria is approximately six miles south of downtown Washington, D.C.Like the rest of northern Virginia, as well as... (independent city) (3,263.33/km² > 8,451.99/sq mi)
Washington	Ferry County (1.2718/km² > 3.2940/sq mi)	King County King County, Washington King County is a county located in the U.S. state of Washington. The population in the 2010 census was 1,931,249. King is the most populous county in Washington, and the 14th most populous in the United States.... (315.46/km² > 817.03/sq mi)
West Virginia	Pocahontas County Pocahontas County, West Virginia As of the census of 2000, there were 9,131 people, 835 households, and 527 families residing in the county. The population density was 10 people per square mile . There were 7,594 housing units at an average density of 8 per square mile... (3.7494/km² > 9.7109/sq mi)	Ohio County Ohio County, West Virginia As of the census of 2000, there were 47,427 people, 19,733 households, and 12,155 families residing in the county. The population density was 447 people per square mile . There were 22,166 housing units at an average density of 209 per square mile... (172.46/km² > 446.68/sq mi)
Wisconsin	Iron County Iron County, Wisconsin Iron County is a county located in the U.S. state of Wisconsin. As of 2000, the population was 6,861. Its county seat is Hurley.-Geography:According to the U.S... (3.4983/km² > 9.0606/sq mi)	Milwaukee County (1,502.73/km² > 3,892.06/sq mi)
Wyoming	Niobrara County (0.3539/km² > 0.9167/sq mi)	Laramie County Laramie County, Wyoming Laramie County is the most populous of the 23 counties of the U.S. state of Wyoming. The county is located in the southeastern corner of the state. The county's population was 91,738 at the 2010 census. The county seat is Cheyenne, the state capital... (11.73/km² > 30.38/sq mi)

General References

US Census Quick Facts
For a state map showing the counties, select in http://quickfacts.census.gov/qfd/ the state and select "view map"; select a county to obtain data about it.*
For a table of counties of a state, with areas, populations, densities and more (using miles), select the state in http://factfinder.census.gov/servlet/BasicFactsServlet?_basicfacts=1&_mult1=8569897&_geo2=ST-2&_current=&_action=_SLSelected&_child_geo_id=undefined&_lang=en.
Map of the US showing population density per county (pdf, see p. 6)
2002 Census of Governments; Volume 1, No. 1, Government Organization. U.S. Census Bureau. http://www.census.gov/prod/2003pubs/gc021x1.pdf. Page 8 shows a chart of counties by population and by state.

External links

Labor Statistics County Employment and Wages

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