Sweetwater County, Wyoming, USA
County or equivalent
Location overview
Sweetwater County is in southwestern Wyoming and is the state’s largest county by area. Green River is the county seat, and Rock Springs is another major population center. Its landscape includes broad sagebrush basins, buttes, mesas and river canyons. The county originated as Carter County in 1867 and took the Sweetwater name in 1869. Railroads, coal, natural gas and trona production have shaped its settlement and economy.