List of longest state highways in the United States

United States

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

, each state maintains its own system of state highways. This is a list of the longest state highways in each state. , the longest state highway in the nation is Montana Highway 200

Montana Highway 200

Highway 200 in the U.S. State of Montana is a route running westerly covering the entire state of Montana, from the starting point of ND 200 near Fairview, Montana to ID 200, near Heron, Montana...

, which is 701 miles (1128 km) long.

State	Highway	mi Miles Miles is the plural of mile.Miles may also refer to:- People :Miles Brothers, American cinema pioneers Miles Miles Browning, World War II admiral Miles Davis, jazz trumpet player** Miles Austin, Dallas Cowboys wide receiver...	km	Ref.
Alabama Alabama Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...	Alabama State Route 3	386.449	621.929
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...	Alaska Route 1 Alaska Route 1 Alaska Route 1 is a state highway in the southern portion of the U.S. state of Alaska. It runs from Homer northeast and east to Tok by way of Anchorage...	545.92	878.57	Alaska Department of Transportation and Public Facilities, Northern Region General Log, April 25, 2006 (Routes 135000 (Glenn Highway), 190000 (Richardson Highway), and 230000 (Tok Cut-Off Highway))
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...	Arizona State Route 87	272.66	438.80
Arkansas Arkansas Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...	Arkansas Highway 7	296.01	476.38
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...	CA 1 California State Route 1 State Route 1 , more often called Highway 1, is a state highway that runs along much of the Pacific coast of the U.S. state of California. It is famous for running along some of the most beautiful coastlines in the world, leading to its designation as an All-American Road.Highway 1 does not run...	655.84	1055.48
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...	State Highway 14 Colorado State Highway 14 State Highway 14 in the U.S. state of Colorado is an east–west state highway approximately long. One of the longest state highways in Colorado, it traverses four counties along the northern edge of the state, spanning a geography from the continental divide in the Rocky Mountains to the...	236.92	381.29
Connecticut Connecticut Connecticut is a state in the New England region of the northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, and the state of New York to the west and the south .Connecticut is named for the Connecticut River, the major U.S. river that approximately...	Connecticut Route 15	83.53	134.43
Delaware Delaware Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...	Delaware Route 1	103.02	165.79
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....	District of Columbia Route 295 District of Columbia Route 295 District of Columbia Route 295 , also known as the Anacostia Freeway south of East Capitol Street or Kenilworth Avenue north of East Capitol Street, is a freeway in the District of Columbia, and currently the only numbered route in the District that is not an Interstate Highway or U.S. Highway...	4.29	6.90
Florida Florida Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...	Florida State Road 10	394	634
Georgia Georgia (U.S. state) Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...	Georgia State Route 11 Georgia State Route 11 State Route 11 runs the entire length of the U.S. state of Georgia. It is the longest route in the state. The route begins at the Florida state line south of Statenville. The route travels north cosigned with US 129 through Statenville, Lakeland, Nashville, Ocilla, Fitzgerald, and Abbeville, before...	374	602
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...	Hawaii Route 11	122.3	196.8
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....	Idaho State Highway 75 Idaho State Highway 75 State Highway 75 is a two-lane highway that travels through the Sawtooth Range of central Idaho from Shoshone to Challis. The road is designated as one of Idaho's scenic byways and provides access to Sawtooth National Recreation Area...	170.666	270.660
Illinois Illinois Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...	Illinois Route 1 Illinois Route 1 Illinois Route 1 is a state highway in the U.S. state of Illinois. Running parallel to the Indiana border, it is also the longest state road, starting on the south side of Chicago as Halsted Street at the intersection with 95th Street, south to a free ferry crossing to Kentucky at Cave-In-Rock on...	336	541
Indiana Indiana Indiana is a US state, admitted to the United States as the 19th on December 11, 1816. It is located in the Midwestern United States and Great Lakes Region. With 6,483,802 residents, the state is ranked 15th in population and 16th in population density. Indiana is ranked 38th in land area and is...	Indiana State Road 37 Indiana State Road 37 State Road 37 in the U.S. State of Indiana is a major route in Indiana, running as a 4-lane divided highway for 110 miles of its course....	232.5	374
Iowa Iowa Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...	Iowa Highway 3	328	528
Kansas Kansas Kansas is a US state located in the Midwestern United States. It is named after the Kansas River which flows through it, which in turn was named after the Kansa Native American tribe, which inhabited the area. The tribe's name is often said to mean "people of the wind" or "people of the south...	K-4 K-4 (Kansas highway) K-4 is the longest designated state highway in Kansas traversing from north of Scott City at US-83 to US-59 near Nortonville in northeast Kansas. A segment of the highway in McPherson County overlaps Interstate 135, and a section in Topeka runs concurrent with Interstate 70.-Western Kansas:K-4...	367	591
Kentucky Kentucky The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...	Kentucky Route 80	464.936	748.242
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...	Louisiana Highway 1 Louisiana Highway 1 Louisiana Highway 1 is a state highway in Louisiana. At 436.20 miles , it is the longest numbered highway of any class in Louisiana. It runs diagonally across the state, connecting the oil and gas fields near the island of Grand Isle with the northwest corner of the state, north of Shreveport.The...	436.20	702.00
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...	Maine State Route 11	401.2	645.6
Maryland Maryland Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...	Maryland Route 2 Maryland Route 2 Maryland Route 2 is the longest state highway in the U.S. state of Maryland. The route runs from Solomons Island in Calvert County north to an intersection with U.S. Route 1 and U.S. Route 40 Truck in Baltimore...	79.24	127.52
Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	Massachusetts Route 28	151.93	244.51
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"....	M-28 M-28 (Michigan highway) M-28 is an east–west state trunkline highway that almost completely traverses the Upper Peninsula in the U.S. state of Michigan, from Wakefield to near Sault Ste. Marie in Bruce Township...	290.373	467.310
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...	Minnesota State Highway 1 Minnesota State Highway 1 Minnesota State Highway 1 is a highway in northwest and northeast Minnesota, which runs from North Dakota Highway 54 at the North Dakota state line and continues east to its eastern terminus at its intersection with Minnesota Highway 61 at the unincorporated town of Illgen City in Beaver Bay...	345.954	556.744
Mississippi Mississippi Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...	Mississippi Highway 15	328	528
Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...	Route 5	351	565
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,...	Montana Highway 200 Montana Highway 200 Highway 200 in the U.S. State of Montana is a route running westerly covering the entire state of Montana, from the starting point of ND 200 near Fairview, Montana to ID 200, near Heron, Montana...	701	1128
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....	Nebraska Highway 92 Nebraska Highway 92 Nebraska Highway 92 is a highway in Nebraska. Its western terminus is at the Wyoming border west of Lyman, Nebraska and its eastern terminus is in Omaha at the Missouri River, where it enters Iowa. Nebraska Highway 92 is part of a continuous 4-state "Highway 92" which begins in Torrington,...	489.08	787.10
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...	Nevada State Route 318 Nevada State Route 318 State Route 318 runs from U.S. Route 93 at Crystal Springs, Nevada north to a location on U.S. Route 6 approximately southwest of Ely. It is often used as a shortcut between Ely and Las Vegas....	110.775	178.275
New Hampshire New Hampshire New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...	New Hampshire Route 16 New Hampshire Route 16 New Hampshire Route 16 is a long north–south highway in the U.S. state of New Hampshire. Much of its length is close to the border with Maine. NH 16 is the main route from the Seacoast region north to the Lakes Region and the White Mountains. The section from Portsmouth to Milton is a...	149.75	241.00
New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	New Jersey Route 47	75.19	121.01
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...	New Mexico State Road 120 New Mexico State Road 120 State Road 120 is a long state road in the U.S. state of New Mexico. The route traverses four counties: Colfax, Mora, Harding, and Union, and is the longest state road in New Mexico...	119.9	192.96
New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	New York State Route 17 New York State Route 17 New York State Route 17 is a state highway that extends for through the Southern Tier and Downstate regions of New York in the United States...	396.84	638.65
North Carolina North Carolina North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...	North Carolina Highway 24	284	457
North Dakota North Dakota North Dakota is a state located in the Midwestern region of the United States of America, along the Canadian border. The state is bordered by Canada to the north, Minnesota to the east, South Dakota to the south and Montana to the west. North Dakota is the 19th-largest state by area in the U.S....	North Dakota Highway 200 North Dakota Highway 200 North Dakota Highway 200 is a major east–west highway in North Dakota. It runs from Minnesota State Highway 200 at the Minnesota border near Halstad, Minnesota to Montana Highway 200 near Fairview, Montana....	420	675.92
Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	Ohio State Route 7	292.20	470.25
Oklahoma Oklahoma Oklahoma is a state located in the South Central region of the United States of America. With an estimated 3,751,351 residents as of the 2010 census and a land area of 68,667 square miles , Oklahoma is the 28th most populous and 20th-largest state...	State Highway 3	616.5	992
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...	Oregon Route 140	237.01	381.43
Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	Pennsylvania Route 18 Pennsylvania Route 18 Pennsylvania Route 18 is a major north–south highway in Western Pennsylvania whose southern terminus is at the West Virginia state line in Greene County, Pennsylvania near the village of Garrison, while the northern terminus is at PA Route 5 in Lake City, Pennsylvania...	205	330
Rhode Island Rhode Island The state of Rhode Island and Providence Plantations, more commonly referred to as Rhode Island , is a state in the New England region of the United States. It is the smallest U.S. state by area...	Rhode Island Route 114	45.67	73.50
South Carolina South Carolina South Carolina is a state in the Deep South of the United States that borders Georgia to the south, North Carolina to the north, and the Atlantic Ocean to the east. Originally part of the Province of Carolina, the Province of South Carolina was one of the 13 colonies that declared independence...	South Carolina Highway 9	257	414
South Dakota South Dakota South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. Once a part of Dakota Territory, South Dakota became a state on November 2, 1889. The state has an area of and an estimated population of just over...	South Dakota Highway 20 South Dakota Highway 20 South Dakota Highway 20 is a state route that largely runs from border to border across the northern part of the U.S. state of South Dakota that consists of two segments. The longer segment begins at the Montana border west of Camp Crook, and terminates at the junction of U.S. Highway 212 in...	432	695
Tennessee Tennessee Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...	Tennessee State Route 1	538	866
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...	Texas State Highway 16	541.8	871.9
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...	State Route 24 Utah State Route 24 State Route 24 is a state highway in south central Utah which runs south from Salina through Sevier County then east through Wayne County and north east through Emery County...	160.243	257.879
Vermont Vermont Vermont is a state in the New England region of the northeastern United States of America. The state ranks 43rd in land area, , and 45th in total area. Its population according to the 2010 census, 630,337, is the second smallest in the country, larger only than Wyoming. It is the only New England...	Vermont Route 100 Vermont Route 100 Vermont Route 100 is a north–south state highway in Vermont, United States. Running through the center of the state, it travels nearly the entire length of Vermont and is long...	216.55	348.50
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...	Virginia Route 40	227.68	366.43
Washington	Washington State Route 20	436.12	701.87
West Virginia West Virginia West Virginia is a state in the Appalachian and Southeastern regions of the United States, bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the northeast and Maryland to the east...	West Virginia Route 20	262.1	421.8
Wisconsin Wisconsin Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...	Wisconsin Highway 35	412.15	663.15
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...	Wyoming Highway 789 Wyoming Highway 789 Wyoming Highway 789 is a state route in the U.S. state of Wyoming in the United States. Wyoming Highway 789 runs north to south from the Montana border to the Colorado border. For most of its length, it is joined with other routes....	404	650

See also