Sweetwater County, Wyoming

Sweetwater County population, land area and income

Sweetwater County had 41,273 residents in the Census Vintage 2024 estimate, on 10,427.0 square miles of land. It is the largest by land of Wyoming's 23 county-equivalents. That works out to 4.0 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Wyoming has 14,250 residents, so Sweetwater County is 2.9 times that size.

Its SAIPE 2023 median household income of $76,442 is in the top quarter among 3,143 counties with an estimate.

How Sweetwater County's population changed since 2020

Sweetwater County lost 923 residents between the July 2020 and July 2024 estimates, a drop of 2.2%. That ranks 22nd of 23 in Wyoming for growth. The median Wyoming county changed by +0.9%, and the state as a whole by +1.7%.

Since the April 2020 estimates base, Sweetwater County recorded 1,884 births and 1,688 deaths, a natural change of +196. Net international migration added +181 and net domestic migration, people moving to or from other US counties, came to -1,354. The largest single component was domestic migration, which removed 1,354 people.

Where Sweetwater County is

The Census internal point of Sweetwater County is at 41.660300, -108.875700. It sits in UTM zone 12N. The map shades Wyoming's 23 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Sweetwater County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Sweetwater County

2 incorporated places of 1,000+ people have residents in Sweetwater County, 34,441 people together, or 83% of the county. Each figure counts only the part of the town inside Sweetwater County; towns marked "part" extend into another county. The largest is Rock Springs with 22,967.

Counties bordering Sweetwater County

The Census 2024 county adjacency file lists 8 neighbors for Sweetwater County, including 3 across a state line. The most populous is Summit County, UT, with 43,109 residents. Distances run between Census internal points in a straight line.

• UT

  Summit County, UT

  43,109 people

  122 mi WSW

• Fremont County

  39,721 people

  97 mi N

• Lincoln County

  21,000 people

  101 mi WNW

• Uinta County

  20,621 people

  91 mi WSW

• Carbon County

  14,250 people

  100 mi E

• CO

  Moffat County, CO

  13,142 people

  80 mi SSE

• Sublette County

  8,965 people

  93 mi NW

• UT

  Daggett County, UT

  956 people

  62 mi SSW

Distance to Cheyenne and the nearest big city

Cheyenne is 213.2 miles E of Sweetwater County's internal point in a straight line. The nearest place of 100,000 or more is Salt Lake City, UT (population 217,783), 170.1 miles away. The nearest place of 10,000 or more is Rock Springs, WY (population 22,967), 18.4 miles away.

Sweetwater County FIPS code

The FIPS code of Sweetwater County is 56037: state code 56 for Wyoming plus county code 037. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $76,442.