List of the largest counties in the United States by area
Encyclopedia
This is a list of the 100 largest 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...

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

 by area
. The list is based upon the total area of a county, both land and water surface, reported 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...

 during the 2000 Census. 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...

 is not divided into counties.

A different ranking becomes apparent when comparing county areas by land area alone as opposed to total area. Some counties, such as Keweenaw
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...

 and Alger
Alger County, Michigan
Alger County is a county in the U.S. state of Michigan. As of the 2010 census, the population was 9,601. Its county seat is Munising. The Pictured Rocks National Lakeshore is located within the county.-History:...

 Counties in Michigan
Michigan
Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....

, include significant amounts of water in their total area and would not appear on a list that considered land area alone. This list also includes the four counties that would be included when water area is not included.

List of largest counties

Rank County State Total Area Land Area
1 San Bernardino County
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...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

20105.32 sq mi (52,072.5 km²) 20052.5 sq mi (51,935.7 km²)
2 Coconino County
Coconino County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*61.7% White*1.2% Black*27.3% Native American*1.4% Asian*0.1% Native Hawaiian or Pacific Islander*3.1% Two or more races*5.2% Other races*13.5% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

18661.21 sq mi (48,332.3 km²) 18617.42 sq mi (48,218.9 km²)
3 Nye County
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:...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

18158.73 sq mi (47,030.9 km²) 18146.66 sq mi (46,999.6 km²)
4 Elko County
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...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

17202.94 sq mi (44,555.4 km²) 17179.03 sq mi (44,493.5 km²)
5 Mohave County
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...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

13469.71 sq mi (34,886.4 km²) 13311.64 sq mi (34,477 km²)
6 Apache County
Apache County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*23.3% White*0.2% Black*72.9% Native American*0.3% Asian*0.0% Native Hawaiian or Pacific Islander*2.0% Two or more races*1.3% Other races*5.8% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

11218.42 sq mi (29,055.6 km²) 11204.88 sq mi (29,020.5 km²)
7 Lincoln County
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:...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

10636.77 sq mi (27,549.1 km²) 10633.61 sq mi (27,540.9 km²)
8 Sweetwater County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

10491.17 sq mi (27,172 km²) 10425.3 sq mi (27,001.4 km²)
9 Inyo County
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...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

10226.98 sq mi (26,487.8 km²) 10203.1 sq mi (26,425.9 km²)
10 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...

Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

10226.49 sq mi (26,486.5 km²) 10134.33 sq mi (26,247.8 km²)
11 Navajo County
Navajo County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*49.3% White*0.9% Black*43.4% Native American*0.5% Asian*0.1% Native Hawaiian or Pacific Islander*2.5% Two or more races*3.3% Other races*10.8% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

9959.49 sq mi (25,795 km²) 9953.18 sq mi (25,778.6 km²)
12 Malheur County
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...

Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

9929.99 sq mi (25,718.6 km²) 9887.09 sq mi (25,607.4 km²)
13 Humboldt County
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...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

9657.87 sq mi (25,013.8 km²) 9647.91 sq mi (24,988 km²)
14 Fremont County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

9265.8 sq mi (23,998.3 km²) 9182.27 sq mi (23,782 km²)
15 Maricopa County
Maricopa County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*73.0% White*5.0% Black*2.1% Native American*3.5% Asian*0.2% Native Hawaiian or Pacific Islander*3.5% Two or more races*12.7% Other races*29.6% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

9224.27 sq mi (23,890.7 km²) 9203.14 sq mi (23,836 km²)
16 Pima County
Pima County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*74.3% White*3.5% Black*3.3% Native American*2.6% Asian*0.2% Native Hawaiian or Pacific Islander*3.7% Two or more races*12.4% Other races*34.6% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

9188.83 sq mi (23,799 km²) 9186.27 sq mi (23,792.3 km²)
17 White Pine County
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...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

8896.6 sq mi (23,042.1 km²) 8875.98 sq mi (22,988.7 km²)
18 Idaho County
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...

Idaho
Idaho
Idaho is a state in the Rocky Mountain area of the United States. The state's largest city and capital is Boise. Residents are called "Idahoans". Idaho was admitted to the Union on July 3, 1890, as the 43rd state....

8502.48 sq mi (22,021.3 km²) 8484.88 sq mi (21,975.7 km²)
19 Lake County
Lake County, Oregon
Lake County is a county in the high desert south central region of the U.S. state of Oregon, so named for the many lakes found within its boundaries, including Lake Abert, Hart Lake Reservoir, and Goose Lake. While Lake is among Oregon's largest counties, it is sparsely populated with 7,895...

Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

8358.47 sq mi (21,648.3 km²) 8135.75 sq mi (21,071.5 km²)
20 Kern County
Kern County, California
Spreading across the southern end of the California Central Valley, Kern County is the fifth-largest county by population in California. Its economy is heavily linked to agriculture and to petroleum extraction, and there is a strong aviation and space presence. Politically, it has generally...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

8161.42 sq mi (21,138 km²) 8140.96 sq mi (21,085 km²)
21 Yavapai County
Yavapai County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*89.3% White*0.6% Black*1.7% Native American*0.8% Asian*0.1% Native Hawaiian or Pacific Islander*2.5% Two or more races*5.0% Other races*13.6% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

8127.78 sq mi (21,050.9 km²) 8123.3 sq mi (21,039.3 km²)
22 Clark County
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...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

8090.66 sq mi (20,954.7 km²) 7910.34 sq mi (20,487.7 km²)
23 Carbon County
Carbon County, Wyoming
Carbon County is a county located in the U.S. state of Wyoming. As of 2010, the population was 15,885. Its county seat is Rawlins.- History :Carbon County was organized in 1868....

Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

7964.03 sq mi (20,626.7 km²) 7896.14 sq mi (20,450.9 km²)
24 San Juan County
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...

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

7933.09 sq mi (20,546.6 km²) 7820.18 sq mi (20,254.2 km²)
25 Owyhee County
Owyhee County, Idaho
Owyhee County is a county located in the southwestern corner of the U.S. state of Idaho. In area it is the second largest county in Idaho, behind Idaho County. As of the 2000 Census, Owyhee County had a population of 10,644...

Idaho
Idaho
Idaho is a state in the Rocky Mountain area of the United States. The state's largest city and capital is Boise. Residents are called "Idahoans". Idaho was admitted to the Union on July 3, 1890, as the 43rd state....

7696.71 sq mi (19,934.4 km²) 7677.98 sq mi (19,885.9 km²)
26 Riverside County
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,...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

7303.13 sq mi (18,915 km²) 7207.37 sq mi (18,667 km²)
27 Tooele County
Tooele County, Utah
Tooele County is a county located in the U.S. state of Utah. As of 2000, the population was 40,735 and by 2005 was estimated at 51,311. Its county seat and largest city is Tooele....

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

7287.12 sq mi (18,873.6 km²) 6930.35 sq mi (17,949.5 km²)
28 Park County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

6968.51 sq mi (18,048.4 km²) 6942.39 sq mi (17,980.7 km²)
29 Catron County
Catron County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*89.8% White*0.4% Black*2.7% Native American*0.2% Asian*0.0% Native Hawaiian or Pacific Islander*3.1% Two or more races*3.7% Other races*19.0% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

6929.03 sq mi (17,946.1 km²) 6927.81 sq mi (17,942.9 km²)
30 St. Louis County
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...

Minnesota
Minnesota
Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...

6859.91 sq mi (17,767.1 km²) 6225.16 sq mi (16,123.1 km²)
31 Aroostook County
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...

Maine
Maine
Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

6828.79 sq mi (17,686.5 km²) 6671.54 sq mi (17,279.2 km²)
32 Millard County
Millard County, Utah
Millard County is a county located in the U.S. state of Utah. In 2010, its population was 12,420. It was named for Millard Fillmore, thirteenth President of the United States. Its county seat is Fillmore and the largest city is Delta.-Geography:...

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

6828.01 sq mi (17,684.5 km²) 6589.13 sq mi (17,065.8 km²)
33 Box Elder County
Box Elder County, Utah
Box Elder County is a county located in the U.S. state of Utah. It lies on the north end of the Great Salt Lake, covering a large area north to the Idaho border and west to the Nevada border. Included in this area are large tracts of barren desert, contrasted by high, forested mountains. The...

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

6729.03 sq mi (17,428.1 km²) 5723.34 sq mi (14,823.4 km²)
34 Socorro County
Socorro County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*75.1% White*1.1% Black*11.7% Native American*1.2% Asian*0.0% Native Hawaiian or Pacific Islander*2.8% Two or more races*8.1% Other races*48.5% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

6648.71 sq mi (17,220.1 km²) 6646.4 sq mi (17,214.1 km²)
35 Otero County
Otero County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*72.7% White*3.5% Black*6.7% Native American*1.2% Asian*0.2% Native Hawaiian or Pacific Islander*4.2% Two or more races*11.2% Other races*34.5% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

6627.43 sq mi (17,165 km²) 6626.5 sq mi (17,162.6 km²)
36 Washoe County
Washoe County, Nevada
Washoe County is a county located in the U.S. state of Nevada. The population was 421,407 at the 2010 census. Its county seat is Reno. Washoe County includes the Reno-Sparks metropolitan area.-History:...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

6551.32 sq mi (16,967.8 km²) 6342.27 sq mi (16,426.4 km²)
37 Siskiyou County
Siskiyou County, California
Siskiyou County is a county located in the far northernmost part of the U.S. state of California, in the Shasta Cascade region on the Oregon border. Yreka is the county seat. Because of its substantial natural beauty, outdoor recreation opportunities, and Gold Rush era history, it is an important...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

6347.46 sq mi (16,439.8 km²) 6286.78 sq mi (16,282.7 km²)
38 Cochise County
Cochise County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*78.5% White*4.2% Black*1.2% Native American*1.9% Asian*0.3% Native Hawaiian or Pacific Islander*4.0% Two or more races*9.6% Other races*32.4% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

6218.77 sq mi (16,106.5 km²) 6169.45 sq mi (15,978.8 km²)
39 Brewster County
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...

Texas
Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

6192.78 sq mi (16,039.2 km²) 6192.61 sq mi (16,038.8 km²)
40 Klamath County
Klamath County, Oregon
-National protected areas:* Bear Valley National Wildlife Refuge* Crater Lake National Park * Deschutes National Forest * Fremont National Forest * Klamath Marsh National Wildlife Refuge* Lower Klamath National Wildlife Refuge...

Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

6135.75 sq mi (15,891.5 km²) 5944.19 sq mi (15,395.4 km²)
41 Chaves County
Chaves County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*70.9% White*2.0% Black*1.2% Native American*0.6% Asian*0.1% Native Hawaiian or Pacific Islander*3.2% Two or more races*22.0% Other races*52.0% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

6075.07 sq mi (15,734.4 km²) 6070.86 sq mi (15,723.5 km²)
42 Pershing County
Pershing County, Nevada
Pershing County is a county located in the U.S. state of Nevada. As of the 2000 census, the population was 6,693. Its county seat is Lovelock. The county was named after army general John J. Pershing . It was formed from Humboldt County in 1919, and the last county to be established in...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

6067.55 sq mi (15,714.9 km²) 6036.56 sq mi (15,634.6 km²)
43 Fresno County
Fresno County, California
Fresno County is a county located in the Central Valley of the U.S. state of California, south of Stockton and north of Bakersfield. As of the 2010 census, it is the tenth most populous county in California with a population of 930,450, and the sixth largest in size with an area of . The county...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

6017.42 sq mi (15,585 km²) 5962.73 sq mi (15,443.4 km²)
44 Cherry County
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...

Nebraska
Nebraska
Nebraska is a state on the Great Plains of the Midwestern United States. The state's capital is Lincoln and its largest city is Omaha, on the Missouri River....

6009.54 sq mi (15,564.6 km²) 5960.52 sq mi (15,437.7 km²)
45 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...

Michigan
Michigan
Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....

5965.96 sq mi (15,451.8 km²) 540.97 sq mi (1,401.1 km²)
46 Rio Arriba County
Rio Arriba County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*51.6% White*0.5% Black*16.0% Native American*0.4% Asian*0.0% Native Hawaiian or Pacific Islander*3.3% Two or more races*28.2% Other races*71.3% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

5896.1 sq mi (15,270.8 km²) 5857.63 sq mi (15,171.2 km²)
47 Beaverhead County
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:...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

5572.04 sq mi (14,431.5 km²) 5542.31 sq mi (14,354.5 km²)
48 San Juan County
San Juan County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*51.6% White*0.6% Black*36.6% Native American*0.4% Asian*0.1% Native Hawaiian or Pacific Islander*3.5% Two or more races*7.2% Other races*19.1% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

5538.36 sq mi (14,344.3 km²) 5514.02 sq mi (14,281.2 km²)
49 Lander County
Lander County, Nevada
Lander County is a county located in the U.S. state of Nevada. As of the 2000 census, the population was 5,794. Its county seat is Battle Mountain.-History:...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

5519.47 sq mi (14,295.4 km²) 5493.63 sq mi (14,228.4 km²)
50 Yuma County
Yuma County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*70.4% White*2.0% Black*1.6% Native American*1.2% Asian*0.2% Native Hawaiian or Pacific Islander*3.8% Two or more races*20.8% Other races*59.7% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

5518.96 sq mi (14,294 km²) 5514.09 sq mi (14,281.4 km²)
51 McKinley County
McKinley County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*15.2% White*0.5% Black*75.5% Native American*0.8% Asian*0.0% Native Hawaiian or Pacific Islander*3.1% Two or more races*4.6% Other races*13.3% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

5455.22 sq mi (14,129 km²) 5448.72 sq mi (14,112.1 km²)
52 Natrona County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

5375.72 sq mi (13,923.1 km²) 5339.88 sq mi (13,830.2 km²)
53 Pinal County
Pinal County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*72.4% White*4.6% Black*5.6% Native American*1.7% Asian*0.4% Native Hawaiian or Pacific Islander*3.8% Two or more races*11.5% Other races*28.5% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

5374.09 sq mi (13,918.8 km²) 5369.59 sq mi (13,907.2 km²)
54 Okanogan County Washington 5315.16 sq mi (13,766.2 km²) 5268.07 sq mi (13,644.2 km²)
55 Flathead County
Flathead County, Montana
-National protected areas:* Pacific Northwest National Scenic Trail * Flathead National Forest * Glacier National Park * Kootenai National Forest * Lolo National Forest * Lost Trail National Wildlife Refuge-Demographics:...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

5256.45 sq mi (13,614.1 km²) 5098.34 sq mi (13,204.6 km²)
56 Phillips County
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:...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

5212.17 sq mi (13,499.5 km²) 5139.57 sq mi (13,311.4 km²)
57 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:...

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

5208.2 sq mi (13,489.2 km²) 5174.22 sq mi (13,401.2 km²)
58 Douglas County
Douglas County, Oregon
-National protected areas:* Crater Lake National Park * Rogue River-Siskiyou National Forest * Siuslaw National Forest * Umpqua National Forest * Willamette National Forest -Adjacent counties:* Lane County, Oregon -...

Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

5133.83 sq mi (13,296.6 km²) 5036.62 sq mi (13,044.8 km²)
59 Hawaii County
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...

Hawaii
Hawaii
Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

5086.7 sq mi (13,174.5 km²) 4028.02 sq mi (10,432.5 km²)
60 Valley County
Valley County, Montana
-Demographics:As of the census of 2000, there were 7,675 people, 3,150 households, and 2,129 families residing in the county. The population density was 2 people per square mile . There were 4,847 housing units at an average density of 1 per square mile...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

5061.98 sq mi (13,110.5 km²) 4921 sq mi (12,745.3 km²)
61 Alger County
Alger County, Michigan
Alger County is a county in the U.S. state of Michigan. As of the 2010 census, the population was 9,601. Its county seat is Munising. The Pictured Rocks National Lakeshore is located within the county.-History:...

Michigan
Michigan
Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....

5049.08 sq mi (13,077.1 km²) 917.83 sq mi (2,377.2 km²)
62 Rosebud County
Rosebud County, Montana
-Demographics:As of the census of 2000, there were 9,383 people, 3,307 households, and 2,417 families residing in the county. The population density was 2 people per square mile . There were 3,912 housing units at an average density of 1 per square mile...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

5026.94 sq mi (13,019.7 km²) 5012.37 sq mi (12,982 km²)
63 Churchill County
Churchill County, Nevada
Churchill County is a county located in the western U.S. state of Nevada. As of the 2000 census, the population was 23,982. As of July 1, 2007, the population of Churchill County was estimated at 27,190. The county, named after Mexican-American War hero brevet Brigadier General Sylvester Churchill,...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

5023.38 sq mi (13,010.5 km²) 4929.08 sq mi (12,766.3 km²)
64 Big Horn County
Big Horn County, Montana
- National protected areas :* Bighorn Canyon National Recreation Area * Little Bighorn Battlefield National Monument- Economy :Coal Mining and Agriculture both play major roles in Big Horn County’s economy...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

5014.65 sq mi (12,987.9 km²) 4994.81 sq mi (12,936.5 km²)
65 Custer County
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...

Idaho
Idaho
Idaho is a state in the Rocky Mountain area of the United States. The state's largest city and capital is Boise. Residents are called "Idahoans". Idaho was admitted to the Union on July 3, 1890, as the 43rd state....

4936.79 sq mi (12,786.2 km²) 4925.45 sq mi (12,756.9 km²)
66 Sublette County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

4935.66 sq mi (12,783.3 km²) 4882.57 sq mi (12,645.8 km²)
67 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....

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

4847.54 sq mi (12,555.1 km²) 4668.06 sq mi (12,090.2 km²)
68 Tulare County
Tulare County, California
Tulare County is a county located in the Central Valley of the U.S. state of California, south of Fresno. Sequoia National Park is located in the county, as are part of Kings Canyon National Park, in its northeast corner , and part of Mount Whitney, on its eastern border...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

4839.09 sq mi (12,533.2 km²) 4823.97 sq mi (12,494 km²)
69 Lincoln County
Lincoln County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*85.1% White*0.5% Black*2.4% Native American*0.4% Asian*0.0% Native Hawaiian or Pacific Islander*2.5% Two or more races*9.1% Other races*29.8% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

4831.25 sq mi (12,512.9 km²) 4830.97 sq mi (12,512.2 km²)
70 Campbell County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

4801.56 sq mi (12,436 km²) 4796.76 sq mi (12,423.6 km²)
71 Gila County
Gila County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*76.8% White*0.4% Black*14.8% Native American*0.5% Asian*0.1% Native Hawaiian or Pacific Islander*2.0% Two or more races*5.4% Other races*17.9% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

4795.74 sq mi (12,420.9 km²) 4767.7 sq mi (12,348.3 km²)
72 Las Animas County
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...

Colorado
Colorado
Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

4775.42 sq mi (12,368.3 km²) 4772.63 sq mi (12,361.1 km²)
73 Pecos County
Pecos County, Texas
Pecos County is a county located in Texas which is named for the Pecos River. It is one of the nine counties that comprise the Trans-Pecos region of West Texas. In 2000, its population was 16,809. The county seat is Fort Stockton....

Texas
Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

4764.73 sq mi (12,340.6 km²) 4763.66 sq mi (12,337.8 km²)
74 Los Angeles County
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...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

4752.32 sq mi (12,308.5 km²) 4060.87 sq mi (10,517.6 km²)
75 Moffat County
Moffat County, Colorado
Moffat County is the northwesternmost and the second most extensive of the 64 counties of the State of Colorado of the United States. The county population was 13,184 at U.S. Census 2000. The county seat is Craig.- History :...

Colorado
Colorado
Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

4750.94 sq mi (12,304.9 km²) 4742.25 sq mi (12,282.4 km²)
76 San Miguel County
San Miguel County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*66.6% White*1.4% Black*1.7% Native American*0.8% Asian*0.1% Native Hawaiian or Pacific Islander*3.9% Two or more races*25.5% Other races*76.8% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

4735.63 sq mi (12,265.2 km²) 4717.04 sq mi (12,217.1 km²)
77 Lane County
Lane County, Oregon
-National protected areas:*Oregon Islands National Wildlife Refuge *Siuslaw National Forest *Umpqua National Forest *Willamette National Forest -Government:...

Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

4721.79 sq mi (12,229.4 km²) 4554 sq mi (11,794.8 km²)
78 Lassen County
Lassen County, California
Lassen County is a county located in the northeastern portion of the U.S. state of California. As of the 2010 census, the population was 34,895, up from 33,828 at the 2000 census...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

4720.37 sq mi (12,225.7 km²) 4557.27 sq mi (11,803.3 km²)
79 Graham County
Graham County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*72.1% White*1.8% Black*14.4% Native American*0.5% Asian*0.1% Native Hawaiian or Pacific Islander*2.8% Two or more races*8.3% Other races*30.4% Hispanic or Latino -2000:...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

4641.14 sq mi (12,020.5 km²) 4629.32 sq mi (11,989.9 km²)
80 Hudspeth County
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...

Texas
Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

4571.93 sq mi (11,841.2 km²) 4571 sq mi (11,838.8 km²)
81 Lemhi County
Lemhi County, Idaho
Lemhi County is a county located in the U.S. state of Idaho. The county was established in 1869, named after Fort Lemhi , a remote Mormon missionary settlement from 1855-58 in Bannock and Shoshone territory. As of the 2000 Census the county had a population of 7,806...

Idaho
Idaho
Idaho is a state in the Rocky Mountain area of the United States. The state's largest city and capital is Boise. Residents are called "Idahoans". Idaho was admitted to the Union on July 3, 1890, as the 43rd state....

4569.5 sq mi (11,835 km²) 4564.16 sq mi (11,821.1 km²)
82 Cibola County
Cibola County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*41.8% White*1.0% Black*41.0% Native American*0.5% Asian*0.1% Native Hawaiian or Pacific Islander*3.1% Two or more races*12.5% Other races*36.5% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

4541.71 sq mi (11,763 km²) 4539.21 sq mi (11,756.5 km²)
83 Grant County
Grant County, Oregon
Grant County is a county located in the U.S. state of Oregon. It is included in the 8 county definition of Eastern Oregon. In 2010, its population was 7,445. It is named for President Ulysses S. Grant, who served as an army officer in the Oregon Territory, and at the time of the county's creation...

Oregon
Oregon
Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

4529.32 sq mi (11,730.9 km²) 4528.6 sq mi (11,729 km²)
84 San Diego County
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...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

4525.52 sq mi (11,721 km²) 4199.89 sq mi (10,877.7 km²)
85 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...

Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

4513.36 sq mi (11,689.5 km²) 4499.95 sq mi (11,654.8 km²)
86 Uintah County
Uintah County, Utah
This page deals with the Utah County. For the Wyoming County, see Uinta County, Wyoming.Uintah County is a county located in the U.S. state of Utah. As of 2000 the population was 25,224 and by 2009 was estimated at 31,536. It was named for the Ute Indians, the tribe that lives in the basin. Its...

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

4498.98 sq mi (11,652.3 km²) 4477.07 sq mi (11,595.6 km²)
87 Imperial County
Imperial County, California
Imperial County is a county located in the Imperial Valley, in the far southeast of the U.S. state of California, bordering both Arizona and Mexico. It is part of the El Centro Metropolitan Area, which encompasses all of Imperial County. The population as of 2000 was 142,361. The county seat is the...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

4481.73 sq mi (11,607.6 km²) 4174.73 sq mi (10,812.5 km²)
88 Emery County
Emery County, Utah
Emery County is a county located in the U.S. state of Utah. As of 2000 the population was 10,860, and by 2009 had been estimated to decrease to 10,629. It was named for George W. Emery, governor of the Utah Territory in 1875...

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

4461.54 sq mi (11,555.3 km²) 4451.85 sq mi (11,530.2 km²)
89 Lea County
Lea County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*75.0% White*4.1% Black*1.2% Native American*0.5% Asian*0.1% Native Hawaiian or Pacific Islander*2.6% Two or more races*16.5% Other races*51.1% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

4394.02 sq mi (11,380.5 km²) 4392.96 sq mi (11,377.7 km²)
90 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....

Maine
Maine
Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

4377.36 sq mi (11,337.3 km²) 3966.22 sq mi (10,272.5 km²)
91 Fergus County
Fergus County, Montana
-National protected areas:* Charles M. Russell National Wildlife Refuge * Lewis and Clark National Forest * Upper Missouri River Breaks National Monument -Demographics:...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

4350.36 sq mi (11,267.4 km²) 4339.17 sq mi (11,238.4 km²)
92 Yakima County
Yakima County, Washington
Yakima County is the second largest county by area in the U.S. state of Washington. It is named after the Yakama tribe of Native Americans. In the 2010 census, its population was 243,231...

Washington 4311.61 sq mi (11,167 km²) 4296.23 sq mi (11,127.2 km²)
93 Albany County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

4308.79 sq mi (11,159.7 km²) 4272.75 sq mi (11,066.4 km²)
94 Converse County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

4265.1 sq mi (11,046.6 km²) 4254.72 sq mi (11,019.7 km²)
95 Blaine County
Blaine County, Montana
-National protected areas:* Black Coulee National Wildlife Refuge* Nez Perce National Historical Park * Upper Missouri River Breaks National Monument -Economy:The main industry in Blaine County is Agriculture...

Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

4238.92 sq mi (10,978.8 km²) 4226.18 sq mi (10,945.8 km²)
96 Sierra County
Sierra County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*85.6% White*0.4% Black*1.7% Native American*0.4% Asian*0.0% Native Hawaiian or Pacific Islander*3.3% Two or more races*8.6% Other races*28.0% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

4236.3 sq mi (10,972 km²) 4180.23 sq mi (10,826.7 km²)
97 Teton County
Teton County, Wyoming
Teton County is a county located in the U.S. state of Wyoming. As of 2010, the population was 21,294. Its county seat is Jackson. Teton County contains the affluent Jackson Hole skiing area...

Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

4221.8 sq mi (10,934.4 km²) 4007.76 sq mi (10,380.1 km²)
98 Modoc County
Modoc County, California
Modoc County is a county located in the far northeast corner of the U.S. state of California, bounded by the state of Oregon to the north and the state of Nevada to the east. As of the 2010 census, its population was 9,686, up from 9,449 at the 2000 census. The current county seat is Alturas, the...

California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

4203.37 sq mi (10,886.7 km²) 3944.1 sq mi (10,215.2 km²)
99 Eddy County
Eddy County, New Mexico
-2010:Whereas according to the 2010 U.S. Census Bureau:*77.4% White*1.4% Black*1.5% Native American*0.7% Asian*0.0% Native Hawaiian or Pacific Islander*3.0% Two or more races*16.0% Other races*44.1% Hispanic or Latino -2000:...

New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

4197.57 sq mi (10,871.7 km²) 4182.02 sq mi (10,831.4 km²)
100 Eureka County
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:...

Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

4179.96 sq mi (10,826 km²) 4175.68 sq mi (10,815 km²)
101 (94) Johnson County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

4174.71 sq mi (10,812.4 km²) 4166.28 sq mi (10,790.6 km²)
102 (95) Kane County
Kane County, Utah
As of the census of 2000, there were 6,046 people, 2,237 households, and 1,628 families residing in the county. The population density was 2 people per square mile . There were 3,767 housing units at an average density of 1 per square mile...

Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

4108.42 sq mi (10,640.8 km²) 3991.96 sq mi (10,339.1 km²)
104 (99) Lincoln County Wyoming
Wyoming
Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

4089.01 sq mi (10,590.5 km²) 4069.09 sq mi (10,538.9 km²)
106 (100) Weld County
Weld County, Colorado
As of the census of 2000, there were 180,936 people, 63,247 households, and 45,221 families residing in the county. The population density was 45 people per square mile . There were 66,194 housing units at an average density of 17 per square mile...

Colorado
Colorado
Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

4021.56 sq mi (10,415.8 km²) 3992.45 sq mi (10,340.4 km²)

Alaskan boroughs and Census Areas

Unlike most states, 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...

 is divided into boroughs and census areas that serve as 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 for the Census Bureau. If included with the remainder of the counties and county-equivalent areas in the United States, Alaska's boroughs and census areas would occupy the largest 11. Below is a list of these boroughs and census areas that would rank in the top 100 if included in the above list.

The Unorganized Borough, in which all of the census areas are located, is not considered a county-equivalent area and is not included in this list. With an area of 323440 sq mi (837,705.8 km²), it would easily top the list, outranking every state in the country (except Alaska).

The rankings in the below list reflect the rank each borough or census area would have if included with all counties and county-equivalent areas in the United States.
Rank County State Total Area Land Area
1 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...

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...

147842.51 sq mi (382,910.3 km²) 145899.69 sq mi (377,878.5 km²)
2 North Slope Borough
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...

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...

94762.64 sq mi (245,434.1 km²) 88817.12 sq mi (230,035.3 km²)
3 Bethel Census Area
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...

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...

45508.46 sq mi (117,866.4 km²) 40633.31 sq mi (105,239.8 km²)
4 Northwest Arctic Borough
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...

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...

40762 sq mi (105,573.1 km²) 35898.34 sq mi (92,976.3 km²)
5 Valdez-Cordova Census Area
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...

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...

40199.15 sq mi (104,115.3 km²) 34319.1 sq mi (88,886.1 km²)
6 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...

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...

30906.96 sq mi (80,048.7 km²) 23781.96 sq mi (61,595 km²)
7 Nome Census Area
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....

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...

28283.33 sq mi (73,253.5 km²) 23000.91 sq mi (59,572.1 km²)
8 Matanuska-Susitna Borough
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:...

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...

25259.79 sq mi (65,422.6 km²) 24681.54 sq mi (63,924.9 km²)
9 Southeast Fairbanks Census Area
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...

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...

25061.19 sq mi (64,908.2 km²) 24814.86 sq mi (64,270.2 km²)
10 Kenai Peninsula Borough
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...

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...

24754.6 sq mi (64,114.1 km²) 16013.26 sq mi (41,474.2 km²)
11 Dillingham Census Area
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...

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...

20928.41 sq mi (54,204.3 km²) 18674.78 sq mi (48,367.5 km²)
13 Wade Hampton Census Area
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...

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...

19669.24 sq mi (50,943.1 km²) 17193.5 sq mi (44,531 km²)
17 Aleutians East Borough
Aleutians East Borough, Alaska
- See also :*List of airports in the Aleutians East Borough*National Register of Historic Places listings in Aleutians East Borough, Alaska-External links:*-References:...

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...

15011.6 sq mi (38,879.9 km²) 6988.14 sq mi (18,099.2 km²)
18 Aleutians West Census Area
Aleutians West Census Area, Alaska
Aleutians West Census Area is a census area located in the U.S. state of Alaska. It contains most of the Aleutian Islands, from Attu Island in the west to Unalaska Island in the east, as well as the Pribilof Islands, which lie north of the Aleutians in the Bering Sea. As of 2010, the population is...

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...

14116.51 sq mi (36,561.6 km²) 4396.77 sq mi (11,387.6 km²)
20 Denali Borough
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...

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...

12774.53 sq mi (33,085.9 km²) 12749.65 sq mi (33,021.4 km²)
21 Prince of Wales-Outer Ketchikan Census Area
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...

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...

12706.3 sq mi (32,909.2 km²) 7410.62 sq mi (19,193.4 km²)
22 Kodiak Island Borough
Kodiak Island Borough, Alaska
-National protected areas:* Alaska Maritime National Wildlife Refuge ** Barren Islands** Semidi Wilderness*** Semidi Islands** Trinity Islands*** Sitkinak Island*** Tugidak Island...

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...

12023.67 sq mi (31,141.2 km²) 6559.85 sq mi (16,989.9 km²)
23 Skagway-Hoonah-Angoon Census Area
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...

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...

11376.73 sq mi (29,465.6 km²) 7896.48 sq mi (20,451.8 km²)
32 Yakutat City and Borough
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...

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...

9459.28 sq mi (24,499.4 km²) 7650.46 sq mi (19,814.6 km²)
36 Wrangell-Petersburg Census Area
Wrangell-Petersburg Census Area, Alaska
Petersburg 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 community is Petersburg. The population was 6,684 at the 2000 census, at which time it was named the Wrangell-Petersburg Census Area...

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...

9021.21 sq mi (23,364.8 km²) 5834.94 sq mi (15,112.4 km²)
46 Fairbanks North Star Borough
Fairbanks North Star Borough, Alaska
-Demographics:As of the 2000 census, 82,840 people, 29,777 households, and 20,516 families were residing in the borough. The population density was 11 people per square mile . There were 33,291 housing units at an average density of 4 per square mile...

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...

7444.02 sq mi (19,279.9 km²) 7366.24 sq mi (19,078.5 km²)
91 Sitka City and Borough
Sitka City and Borough, Alaska
The City and Borough of Sitka, originally called New Archangel under Russian Rule, is a unified city-borough located on Baranof Island and the southern half of Chichagof Island in the Alexander Archipelago of the Pacific Ocean , in the U.S...

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...

4811.53 sq mi (12,461.8 km²) 2873.98 sq mi (7,443.6 km²)
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