Sweetwater County, Wyoming Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in Wyoming
The population of Sweetwater County, Wyoming is 41,786 as of the 2023 American Community Survey, making it the 4th-largest county in Wyoming. The median household income is $76,464, the median home value is $242,900, and the median age is 37.4.
The population of Sweetwater County has declined 5.3% since 2010 (43,580 → 41,273), a -0.39% annualized rate.
41,786
Population
-0.39%
Annual growth
4
People / sq mi
$76,464
Median Income
$242,900
Median Home Value
Sweetwater County covers 10,427 sq mi of land at 4.0 people per square mile.
About Sweetwater County, WY
Sweetwater County is a county in Wyoming with a population of 41,786. It ranks #4 among counties in Wyoming by population. The median age is 37.4, younger than the national median. The population is 51.2% male and 48.8% female.
The median household income in Sweetwater County is $76,464, near the US median of $74,580. 10.9% of residents live below the federal poverty level. Home values sit at a median of $242,900, with monthly rent averaging $913. The homeownership rate of 74.0% is higher than the national rate of 64.8%.
Educational attainment in Sweetwater County reflects 20.4% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 2.8% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 21.0 minutes each way.
Sweetwater County Population History (2010-2024)
The county of Sweetwater County had a population of 43,580 in 2010 and 41,273 in 2024, a -5.3% growth over 14 years. The peak was 45,189 in 2013. Average annual growth rate: -0.38%.
41,273
Population (2024)
43,580
Population (2010)
45,189
Peak (2013)
-0.38%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 43,580 |
| 2011 | 44,000 |
| 2012 | 45,032 |
| 2013 | 45,189 |
| 2014 | 44,996 |
| 2015 | 44,780 |
| 2016 | 44,319 |
| 2017 | 43,663 |
| 2018 | 43,188 |
| 2019 | 42,917 |
| 2020 | 42,196 |
| 2021 | 41,630 |
| 2022 | 41,322 |
| 2023 | 41,288 |
| 2024 | 41,273 |
Race & Ethnicity
| White | 82.4% |
| Black or African American | 1.2% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 2.6% |
| Two or More Races | 0.0% |
Age & Sex
37.4
Median Age
48.8%
Female
51.2%
Male
14.1%
Age 65+
Age Distribution
Children (under 15): 20.7% · Seniors (65+): 14.1%
Income & Poverty
| Median household income | $76,464+$1,649 vs state |
| Mean household income | $98,608 |
| Per-capita income | $40,988 |
| Poverty rate | 10.9%+3.8% vs state |
| Unemployment rate | 3.9% |
| Employment-to-population | 63.0% |
Top Industries by Employment
The largest employment sector in Sweetwater County is professional & business services, accounting for 22.2% of workers.
How residents commute
2.4%
Drive alone
1.8%
Carpool
79.2%
Public transit
2.8%
Work from home
21.0 min
Avg commute
Housing
$242,900$-42,200 vs state
Median home value
$913
Median rent
74.0%
Homeownership rate
19,226
Total housing units
87.7%
Occupied
12.3%
Vacant
26.0%
Renter-occupied
Social & access
87.1%
With health insurance
95.3%
With broadband internet
47.8%
Foreign-born
9.2%
Veterans (18+)
15.5%
With a disability
91.3%
Speak language other than English at home
Education
92.5%
High School+
20.4%
Bachelor's+
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Part of Wyoming
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County rankings
Frequently Asked Questions
Sweetwater County, Wyoming has a population of 41,786 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in Wyoming. Population density is 4 people per square mile.
The population of Sweetwater County has declined 5.3% since 2010 (43,580 → 41,273), a -0.39% annualized rate.
The median household income in Sweetwater County, Wyoming is $76,464, with mean (average) household income of $98,608 and per-capita income of $40,988. 10.9% of residents live below the federal poverty level.
In Sweetwater County, the largest racial and ethnic groups are White (82.4%), Hispanic or Latino (2.6%), Black or African American (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Sweetwater County, Wyoming is 37.4 years. Residents are 48.8% female and 51.2% male.
The median home value in Sweetwater County is $242,900 and median monthly rent is $913. 74.0% of occupied housing units are owner-occupied. The county has 19,226 total housing units, 12.3% of which are vacant.
The largest employment sector in Sweetwater County, Wyoming is professional, scientific, and management services, employing 22.2% of workers. The unemployment rate is 3.9%.
Cheyenne is among the largest cities associated with Sweetwater County, Wyoming, with a population of 64,976.
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Population, race, income, age, and trends across Wyoming
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.