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Signage for U.S. Highway 16, U.S. Highway 14A and U.S. Highway 191 | |
| Highway names | |
|---|---|
| US Highways | U.S. Highway X (US X) |
| System links | |
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The U.S. Highways in Wyoming are the segments of the United States Numbered Highway System owned and maintained by the Wyoming Department of Transportation.
| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 US 12 | — | — | US 12 at Montana state line | US 12 at South Dakota state line | — | — | US 12 originally went through Wyoming but does not | |
 US 14 | 449.21 | 722.93 | Yellowstone National Park | I-90 / US 14 at the South Dakota line | 1936 | current | ||
 US 16 | 544.04 | 875.55 | Yellowstone National Park | US 16 at the South Dakota line | — | — | ||
 US 18 | 100 | 160 | I-25 / US 20 / US 26 / US 87 in Orin | US 18 at the South Dakota line | 1926 | current | ||
 US 20 | 433 | 697 | Yellowstone National Park | US 20 at the Nebraska line | 1926 | current | ||
 US 26 | 454 | 731 | US 26 at the Idaho line | US 26 at the Nebraska line | 1926 | current | ||
 US 30 | 454.37 | 731.24 | — | — | — | — | Lincoln Highway | |
 US 85 | — | — | — | — | — | — | ||
 US 87 | — | — | — | — | — | — | ||
 US 89 | — | — | — | — | — | — | ||
 US 116 | — | — | — | — | — | — | ||
 US 185 | — | — | — | — | — | — | Replaced by US 87 | |
 US 187 | — | — | — | — | — | — | ||
 US 189 | — | — | — | — | — | — | ||
 US 191 | — | — | — | — | — | — | ||
 US 212 | — | — | — | — | — | — | Beartooth Highway | |
 US 216 | — | — | — | — | — | — | ||
 US 285 | — | — | — | — | — | — | ||
 US 287 | — | — | — | — | — | — | ||
 US 310 | 47.93 | 77.14 | — | — | — | — | ||
 US 312 | — | — | — | — | — | — | ||
 US 320 | — | — | — | — | — | — | ||
 US 420 | — | — | — | — | — | — | ||
 US 789 | — | — | Colorado state line near Baggs | Montana state line near Frannie | — | — | Proposed, but never commissioned as a U.S. Highway. Designation only existed as WYO 789. | |
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| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 US 14A | 103 | 166 | US 14 in Cody | US 14 in Burgess Junction | 1936 | current | ||
 US 14 Bus. | — | — | — | — | — | — | Served Sheridan | |
| US 16 Bus. | — | — | — | — | — | — | Serves Newcastle | |
 US 16 Truck | — | — | — | — | — | — | Serves Newcastle | |
 US 20 Alt. | — | — | Idaho-Wyoming state line | Jackson | — | — | ||
| US 20 Bus. | — | — | Mountain View | Casper | — | — | ||
 US 20 Byp. | — | — | Mountain View | Casper | — | — | ||
| US 20 Bus. | — | — | — | — | — | — | Serves Douglas | |
| US 20 Byp. | — | — | — | — | — | — | Served Manville | |
| US 26 Bus. | — | — | Mountain View | Casper | — | — | ||
| US 26 Byp. | — | — | Mountain View | Casper | — | — | ||
| US 26 Bus. | — | — | — | — | — | — | Serves Douglas | |
| US 30 Byp. | — | — | Kemmerer | Diamondville | — | — | ||
| US 30 Bus. | — | — | — | — | — | — | Serves Green River | |
| US 30 Bus. | — | — | — | — | — | — | Serves Rock Springs | |
| US 30 Bus. | — | — | — | — | — | — | Serves Rawlins | |
| US 30 Bus. | — | — | Pine Bluffs | Nebraska-Wyoming state line | — | — | ||
| US 85 Alt. | — | — | Mule Creek Junction | Wyoming-South Dakota state line | — | — | ||
| US 87 Bus. | — | — | — | — | — | — | Serves Cheyenne | |
| US 87 Bus. | — | — | — | — | — | — | Serves Wheatland | |
| US 87 Bus. | — | — | — | — | — | — | Serves Douglas | |
| US 87 Bus. | — | — | — | — | — | — | Serves Casper | |
| US 87 Bus. | — | — | — | — | — | — | Serves Buffalo | |
| US 87 Bus. | — | — | — | — | — | — | Serves Sheridan | |
 Temp. US 89 | — | — | Wyoming-Utah state line | Hoback | — | — | ||
  US 189 Bus. | — | — | — | — | — | — | Serves Evanston | |
 US 287 Bus. | — | — | — | — | — | — | Serves Rawlins | |
| US 287 Byp. | — | — | — | — | — | — | Serves Rawlins | |
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Johnson County is a county in the north central part of the U.S. state of Wyoming. At the 2020 United States Census, the population was 8,447. The county seat is Buffalo. Kaycee is the only other incorporated town in the county.
Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from downtown San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one of the original routes of the Interstate Highway System; its final segment was opened in 1986. The second-longest Interstate Highway in the United States after I-90, it runs through many major cities, including Oakland, Sacramento, Reno, Salt Lake City, Omaha, Des Moines, and Toledo and passes within 10 miles (16 km) of Chicago, Cleveland, and New York City.
Weston County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 6,838. Its county seat is Newcastle. Its east boundary line abuts the west line of the state of South Dakota.
Sweetwater County is a county in southwestern Wyoming, United States. As of the 2020 United States Census, the population was 42,272, making it the fourth-most populous county in Wyoming. Its county seat is Green River. By area, it is the largest county in Wyoming. Its southern boundary line abuts the north lines of the states of Colorado and Utah.
Sheridan County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 30,921. The county seat is Sheridan. Its northern boundary abuts the Montana state border.
Park County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 29,624. The county seat is Cody.
Natrona County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 79,955, making it the second-most populous county in Wyoming. Its county seat is Casper.
Laramie County is a county located at the southeast corner of the state of Wyoming. As of the 2020 United States Census, the population was 100,512 or 17.4% of the state's total 2020 population, making it the most populous county in Wyoming, but the least populous county in the United States to be the most populous in its state.
Fremont County is a county in the U.S. state of Wyoming. As of the 2020 United States census, the population was 39,234, making it the fifth-most populous county in Wyoming. Its county seat is Lander. The county was founded in 1884 and is named for John C. Frémont, a general, explorer, and politician. It is roughly the size of the state of Vermont.
Campbell County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 47,026, making it the third-most populous county in Wyoming. Its county seat is Gillette.
Big Horn County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 11,521. The county seat is Basin. Its north boundary abuts the south boundary of Montana.
Albany County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 37,066. Its county seat is Laramie, the site of the University of Wyoming. Its south border lies on the northern Colorado state line.
U.S. Route 26 is an east–west United States highway that runs from Seaside, Oregon to Ogallala, Nebraska. When the U.S. highway system was first defined, it was limited to Nebraska and Wyoming; by the 1950s, it continued into Idaho and Oregon. The highway's eastern terminus is in Ogallala, Nebraska at an intersection with Interstate 80. Its western terminus is south of Seaside, Oregon at an intersection with U.S. Route 101. Prior to 2004, the route's last 20 miles (32 km) were co-signed with U.S. Route 101 from the highways' junction south of Seaside north to Astoria where its intersection with U.S. Route 30 was also U.S. 30's western terminus. Long segments of the highway follow the historic Oregon Trail. At its peak, immediately before the establishment of the Interstate Highway System, US 26 was 1,557 miles (2506 km) in length, and terminated in Astoria, Oregon.
U.S. Highway 18 (US 18) is an east–west United States Numbered Highway in the Midwestern United States. The western terminus is in Orin, Wyoming, at an interchange with Interstate 25 (I-25). Its eastern terminus is in downtown Milwaukee, Wisconsin. However, US 18 runs concurrent with other U.S. Highways from its western terminus to Mule Creek Junction, Wyoming. US 18 is one of the original U.S. Highways of 1926. The US 18 designation was originally proposed for a road in Michigan from Grand Haven east to Detroit. This roadway was eventually designated as US 16.
U.S. Highway 87 is a north–south United States highway that runs for 1,998 miles (3,215 km) from northern Montana to southern Texas, making it the longest north-south road to not have a "1" in its number and the third longest north-south road in the country, behind U.S. 41 and U.S. 1. Most of the portion from Billings, Montana to Raton, New Mexico is co-signed along Interstates 90 and 25. It is also co-signed along the majority of I-27 in Texas and future plans call for the interstate to be extended along the US 87 corridor. As of 2004, the highway's northern terminus is in Havre, Montana, at US 2 and its southern terminus is in Port Lavaca, Texas, at SH 238.
U.S. Route 212 (US 212) is a spur of US 12. It runs for 949 miles (1,527 km) from Yellowstone National Park to Minnesota Highway 62 at Edina, Minnesota. It does not intersect US 12 now, but it once had an eastern terminus at US 12 in St. Paul, Minnesota. US 212 passes through the states of Minnesota, South Dakota, Wyoming, and Montana. It goes through the cities of Watertown, South Dakota and Billings, Montana.
U.S. Route 191 is a spur of U.S. Route 91 that has two branches. The southern branch runs for 1,102 miles (1,773 km) from Douglas, Arizona on the Mexican border to the southern part of Yellowstone National Park. The northern branch runs for 442 miles (711 km) from the northern part of Yellowstone National Park to Loring, Montana, at the Canada–US border. Unnumbered roads within Yellowstone National Park connect the two branches. The highway passes through the states of Arizona, Utah, Wyoming, and Montana.
Interstate 80 (I-80) is a part of the Interstate Highway System that runs from San Francisco, California, to Teaneck, New Jersey. In Wyoming, the Interstate Highway runs 402.76 miles (648.18 km) from the Utah state line near Evanston east to the Nebraska state line in Pine Bluffs. I-80 connects Cheyenne, Wyoming's capital and largest city, with several smaller cities along the southern tier of Wyoming, including Evanston, Green River, Rock Springs, Rawlins, and Laramie. The highway also connects those cities with Salt Lake City to the west and Omaha to the east. In Cheyenne, I-80 intersects I-25 and has Wyoming's only auxiliary Interstate, I-180. The Interstate runs concurrently with US Highway 30 (US 30) for most of their courses in Wyoming. I-80 also has shorter concurrencies with US 189 near Evanston, US 191 near Rock Springs, and US 287 and Wyoming Highway 789 (WYO 789) near Rawlins. The Interstate has business loops through all six cities along its course as well as a loop serving Fort Bridger and Lyman east of Evanston.
Wyoming Highway 120 is a 121.96-mile-long (196.28 km) state highway in central Hot Springs and eastern Park County, Wyoming that travels northwest to Montana Highway 72 at the state line.
Media related to U.S. Highways in Wyoming at Wikimedia Commons |
