Sweetwater County, Wyoming
Sweetwater County, Wyoming, has 41,267 residents (July 2025 estimate). Its county seat is Green River. It uses Mountain Time and covers 10,427 sq mi (27,006 km²) of land.
- Resident population, July 2025
- 41,267
- Land area
- 10,427 sq mi (27,006 km²)
- County seat or government
- Green River
- Time zone
- Mountain TimeUTC-07:00 in January; UTC-06:00 in July
- Median household income
- $75,034 ± $3,808
- Median home value
- $251,400 ± $9,650
- Median rent, with utilities
- $911 ± $35
- Homes lived in by their owners
- 74.6% ± 2.2 points
- County type
- County
- Metro or micro area
- Rock Springs, WY micro areaCentral county
- Water area
- 64.2 sq mi (166 km²)
- State
- Wyoming
- County code (FIPS)
- 56037
- Coordinates (central point)
- 41.660328, -108.875677
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Sweetwater County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Mountain TimeAmerica/Denver | UTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 8290127,198 people
- 8293512,012 people
- 823018,180 people
- 82932997 people
- 82934285 people
- 82336269 people
- 82938221 people
- 82945196 people
- 82943187 people
- 82322149 people
- 8292919 people
- 829429 people
12 ZIP Code areas overlap Sweetwater County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
Sweetwater County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Sweetwater County, largest first
- Sweetwater County School District 128,775 people
- Sweetwater County School District 212,618 people
- Carbon County School District 19,969 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Rock Springs, Wyoming (city)23,127 people
- Green River, Wyoming (city)11,581 people
- North Rock Springs, Wyoming (CDP)2,277 people
- Reliance, Wyoming (CDP)572 people
- Purple Sage, Wyoming (CDP)489 people
- Eden, Wyoming (CDP)472 people
- James Town, Wyoming (CDP)431 people
- Clearview Acres, Wyoming (CDP)273 people
- Wamsutter, Wyoming (town)269 people
- Granger, Wyoming (town)257 people
- Washam, Wyoming (CDP)187 people
- Superior, Wyoming (town)177 people
All 19
- Bairoil, Wyoming (town)149 people
- Farson, Wyoming (CDP)68 people
- Arrowhead Springs, Wyoming (CDP)43 people
- Little America, Wyoming (CDP)19 people
- Point of Rocks, Wyoming (CDP)9 people
- McKinnon, Wyoming (CDP)0 people
- Table Rock, Wyoming (CDP)0 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Daggett County, Utah62 mi southwest
- Moffat County, Colorado80 mi southeast
- Uinta County, Wyoming91 mi west
- Sublette County, Wyoming93 mi northwest
- Fremont County, Wyoming97 mi north
- Carbon County, Wyoming100 mi east
- Lincoln County, Wyoming101 mi northwest
- Summit County, Utah122 mi southwest
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.