List of Counties in Wyoming
Wyoming has 23 counties, the fewest of any state except Delaware and Hawaii. The most populous counties are Laramie County (Cheyenne), Natrona County (Casper), Campbell County, Sweetwater County, Fremont County, Albany County, Park County, Sheridan County, Teton County, and Carbon County. Laramie County, home to Cheyenne, the state capital, is the largest by population. Natrona County, which includes Casper, is the second-largest. Wyoming is largely rural, and many of the state’s counties are focused on agriculture, energy, and tourism.
List of All Counties in Wyoming
- Albany County, Wyoming
- Big Horn County, Wyoming
- Campbell County, Wyoming
- Carbon County, Wyoming
- Converse County, Wyoming
- Crook County, Wyoming
- Fremont County, Wyoming
- Goshen County, Wyoming
- Hot Springs County, Wyoming
- Johnson County, Wyoming
- Laramie County, Wyoming
- Lincoln County, Wyoming
- Natrona County, Wyoming
- Niobrara County, Wyoming
- Park County, Wyoming
- Platte County, Wyoming
- Sheridan County, Wyoming
- Sublette County, Wyoming
- Sweetwater County, Wyoming
- Teton County, Wyoming
- Uinta County, Wyoming
- Washakie County, Wyoming
- Weston County, Wyoming
Largest Counties in Wyoming
1. Sweetwater County
Overview
Sweetwater County is Wyoming’s largest county, spanning 10,491 square miles in the southwestern part of the state. It borders several counties: Carbon County to the east, Fremont County to the north, Uinta County to the west, and Lincoln County to the northwest. The county also touches the states of Utah and Colorado to the south. Established in 1867, Sweetwater County’s economy has been historically driven by coal, trona (soda ash), and natural gas extraction. The Green River, an essential waterway, runs through the county, supporting both agriculture and recreation. Its landscape is a mix of arid desert and rugged mountains.
County Facts
- Population: Approximately 41,000
- County Seat: Green River
- Major Airports: Southwest Wyoming Regional Airport (Rock Springs)
- Major Highways: Interstate 80, U.S. Highway 191, U.S. Highway 30
2. Carbon County
Overview
Carbon County covers 7,964 square miles in the south-central part of Wyoming. It was named for its abundant coal resources, which were instrumental in its development, especially during the railroad expansion era. Carbon County borders Sweetwater County to the west, Natrona County to the north, Albany County to the east, and Colorado to the south. The North Platte River flows through the county, and the Medicine Bow Mountains offer scenic vistas and outdoor recreation opportunities. The Union Pacific Railroad helped shape the county’s early growth, with Rawlins serving as an important stop along the route.
County Facts
- Population: Approximately 14,500
- County Seat: Rawlins
- Major Airports: Dixon Airport, Rawlins Municipal Airport/Harvey Field
- Major Highways: Interstate 80, U.S. Highway 30, U.S. Highway 287
3. Fremont County
Overview
Fremont County, located in central Wyoming, is the third-largest county in the state with a land area of 9,266 square miles. It includes diverse geography, such as the Wind River Range, the Owl Creek Mountains, and the Wind River Basin. Fremont County borders Hot Springs County to the north, Sweetwater County to the south, and Natrona County to the east. Named after the explorer John C. Frémont, the county was established in 1884. The Wind River Indian Reservation, home to the Eastern Shoshone and Northern Arapaho tribes, occupies a large part of the county. The county’s economy includes agriculture, mining, and tourism.
County Facts
- Population: Approximately 40,000
- County Seat: Lander
- Major Airports: Riverton Regional Airport
- Major Highways: U.S. Highway 287, U.S. Highway 26, Wyoming Highway 789
4. Natrona County
Overview
Natrona County, the fourth-largest in Wyoming, covers 5,376 square miles in the central part of the state. The county is known for its energy industry, particularly oil, gas, and uranium production. Natrona County is bordered by Fremont County to the west, Converse County to the east, and Carbon County to the south. The city of Casper, the county seat, became a booming economic center following the discovery of oil in the late 19th century. The North Platte River runs through the county, providing irrigation and recreational opportunities. The county’s economic focus is on energy production, ranching, and tourism.
County Facts
- Population: Approximately 80,000
- County Seat: Casper
- Major Airports: Casper-Natrona County International Airport
- Major Highways: Interstate 25, U.S. Highway 20, U.S. Highway 26, U.S. Highway 87
5. Park County
Overview
Park County, located in northwestern Wyoming, covers 6,967 square miles. The county is named for its proximity to Yellowstone National Park and is a major tourism hub, with its economy largely driven by visitors to the national parks and surrounding natural attractions. Park County borders Montana to the north, Big Horn County to the east, and Teton County to the west. It was established in 1909 and contains diverse landscapes, including parts of the Absaroka Range and the Big Horn Basin. The county seat, Cody, is named after Buffalo Bill Cody, the famous frontiersman, who played a significant role in the county’s history.
County Facts
- Population: Approximately 30,000
- County Seat: Cody
- Major Airports: Yellowstone Regional Airport
- Major Highways: U.S. Highway 14, U.S. Highway 16, U.S. Highway 20
6. Uinta County
Overview
Uinta County, located in southwestern Wyoming, spans 2,088 square miles and shares its southern border with Utah. It is bordered by Lincoln County to the north and Sweetwater County to the east. Uinta County has a rich history, with Fort Bridger playing a key role during the westward expansion and migration in the 19th century. Established in 1869, the county’s economy is based on agriculture, energy production, and transportation due to its strategic location near Interstate 80. Its geography includes open plains and rolling hills, making it a gateway for commerce and travel between Wyoming and Utah.
County Facts
- Population: Approximately 20,000
- County Seat: Evanston
- Major Airports: Evanston-Uinta County Burns Field
- Major Highways: Interstate 80, U.S. Highway 189, U.S. Highway 89
7. Campbell County
Overview
Campbell County, located in northeastern Wyoming, covers 4,807 square miles and is a leading producer of coal in the United States, particularly from the Powder River Basin. It is bordered by Crook County to the northeast, Weston County to the southeast, and Johnson County to the west. Established in 1911, Campbell County experienced rapid growth due to its coal mining and energy production. Gillette, the county seat, is often referred to as the “Energy Capital of the Nation.” Besides coal, the county is rich in oil and natural gas resources, which have fueled its economic expansion and population growth.
County Facts
- Population: Approximately 47,000
- County Seat: Gillette
- Major Airports: Gillette-Campbell County Airport
- Major Highways: Interstate 90, U.S. Highway 14, U.S. Highway 59
8. Albany County
Overview
Albany County, located in southeastern Wyoming, spans 4,309 square miles and is home to the University of Wyoming in Laramie. The county borders Colorado to the south and is known for its mountainous landscapes, including the Laramie Mountains and the Medicine Bow Range. Established in 1868, Albany County has a mixed economy focused on education, government services, agriculture, and outdoor recreation. The county’s location along Interstate 80 provides easy access to both Wyoming and neighboring Colorado. Albany County’s diverse geography includes everything from high-altitude plains to dense forests, making it a popular destination for outdoor enthusiasts.
County Facts
- Population: Approximately 38,000
- County Seat: Laramie
- Major Airports: Laramie Regional Airport
- Major Highways: Interstate 80, U.S. Highway 30, U.S. Highway 287
9. Lincoln County
Overview
Lincoln County is located in western Wyoming, covering 4,095 square miles. It shares borders with Idaho to the west and Utah to the southwest, with Uinta County to the south and Sublette County to the north. The county is home to the scenic Bridger-Teton National Forest and the Salt River Range. Lincoln County was established in 1911 and has an economy centered on ranching, natural gas extraction, and outdoor recreation. Its location near the Wyoming-Idaho border makes it a gateway for tourists and travelers. The county seat, Kemmerer, is the birthplace of J.C. Penney, adding to its historical significance.
County Facts
- Population: Approximately 20,000
- County Seat: Kemmerer
- Major Airports: Afton Municipal Airport, Kemmerer Municipal Airport
- Major Highways: U.S. Highway 89, Wyoming Highway 233
10. Teton County
Overview
Teton County, located in northwestern Wyoming, spans 4,214 square miles and is renowned for its proximity to Grand Teton National Park and Yellowstone National Park. It borders Idaho to the west and Park County to the east. Established in 1921, the county’s economy revolves around tourism, with Jackson Hole being one of the most famous destinations for outdoor activities, skiing, and national park access. Teton County has a high cost of living and is known for its affluent population and real estate market. The stunning mountain scenery, abundant wildlife, and recreational opportunities make it one of Wyoming’s most visited areas.
County Facts
- Population: Approximately 24,000
- County Seat: Jackson
- Major Airports: Jackson Hole Airport
- Major Highways: U.S. Highway 26, U.S. Highway 89, Wyoming Highway 22