Sweetwater County, Wyoming

Sweetwater County
County
Rock Springs City Hall, 2007
Rock Springs City Hall, 2007
Flag of Sweetwater County
Flag
Map of Wyoming highlighting Sweetwater County
Location within the U.S. state of Wyoming
Map of the United States highlighting Wyoming
Wyoming's location within the U.S.
Coordinates: 41°40′N 108°53′W / 41.66°N 108.89°W / 41.66; -108.89
Country United States
State Wyoming
FoundedDecember 17, 1867
Named forSweetwater River
SeatGreen River
Largest cityRock Springs
Area
 • Total
10,491 sq mi (27,170 km2)
 • Land10,427 sq mi (27,010 km2)
 • Water64 sq mi (170 km2)  0.6%
Population
 (2020)
 • Total
42,272
 • Estimate 
(2023)[1]
41,249
 • Density4.0/sq mi (1.6/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Area code307
Congressional districtAt-large
Websitewww.sweetwatercountywy.gov

Sweetwater County is a county in southwestern Wyoming, United States.[2] As of the 2020 United States Census, the population was 42,272, making it the fourth-most populous county in Wyoming.[3] Its county seat is Green River.[4] By area, it is the largest county in Wyoming. Its southern boundary line abuts the north lines of the states of Colorado and Utah.

Sweetwater County comprises the Rock Springs, Green River, Wyoming Micropolitan Statistical Area.

  1. ^ "Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2023". United States Census Bureau. Retrieved March 24, 2024.
  2. ^ U.S. Geological Survey Geographic Names Information System: Sweetwater County
  3. ^ "State & County QuickFacts".
  4. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.