Sweetwater County, Wyoming

Sweetwater County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF SWEETWATER GUS Population: 41,273 (2024) ID: 177839	County	Official County Government	Contact: DEPUTY 80 W FLAMING GORGE WAY, STE 109, GREEN RIVER WY 82935-4252
CITY OF ROCK SPRINGS GUS Population: 22,967 (2024) ID: 211495	Municipal	Municipal Government Within County	Contact: DIRECTOR OF ADMINISTRATIVE SERVICES 212 D ST, ROCK SPRINGS WY 82901-6235
CITY OF GREEN RIVER GUS Population: 11,474 (2024) ID: 205729	Municipal	Municipal Government Within County	Contact: HUMAN RESOURCES 50 E 2ND NORTH ST, GREEN RIVER WY 82935-4206
TOWN OF WAMSUTTER GUS Population: 197 (2024) ID: 194272	Municipal	Municipal Government Within County	Contact: DEPUTY CLERK TREASURER PO BOX 6, WAMSUTTER WY 82336-0006
TOWN OF SUPERIOR GUS Population: 183 (2024) ID: 209940	Municipal	Municipal Government Within County	Contact: CLERK TREASURER PO BOX 40, SUPERIOR WY 82945-0040
TOWN OF GRANGER GUS Population: 97 (2024) ID: 177876	Municipal	Municipal Government Within County	Contact: CLERK PO BOX 42, GRANGER WY 82934-0042
TOWN OF BAIROIL GUS Population: 66 (2024) ID: 177877	Municipal	Municipal Government Within County	Contact: CLERK/TREASURER PO BOX 58, BAIROIL WY 82322-0058