Sweetwater County, Wyoming
Sweetwater County: county in Wyoming, United States
About
Sweetwater County is a county located in the U.S. state of Wyoming. As of the 2010 census, the population was 43,806 and a population density of 2 people per km². After 10 years in 2020 county had an estimated population of 42,673 inhabitants. Its county seat is Green River. The county was created 159 years ago in 1866.
County Snapshot
Sweetwater County at a glance
Sweetwater County currently has 7 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
7
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Wyoming counties
23
Open related pagesLargest city
Rock SpringsPopulation 22,943
Top linked places
Quick Facts about Sweetwater County
| Population | 42,673 (2020) |
| Country | United States of America |
| State | Wyoming (United States) |
| Area | 27172 km2 |
| Official name | Sweetwater County |
| Water as percent of area | 0.6% |
| Land as percent of area | 99.4% |
| Latitude & Longitude | 41.6595,-108.8794 |
| Named for | Sweetwater River |
| Altitude | 6,470 feet / 1972 meters |
| Capital | Green River |
| Establishment | January 01, 1867 |
| Time Zone | America/Denver |
| Local time | 21:19:16 (18th April 2026) |
| Density | 2 Pop. per km² as of 2020 |
| Population growth | -2.66% (2010-2020) |
| Weather | 18℉ Partly Cloudy 7-days weather |
Geography
Sweetwater County is located at 41°39'34"N 108°52'46"W (41.6595000, -108.8794200). It has 8 neighbors: Summit County, Carbon County, Moffat County, Daggett County, Fremont County, Lincoln County, Sublette County and Uinta County.
Sweetwater County map
icon to open full mode. View satellite images
The largest city of Sweetwater County is Rock Springs with a population of 22,943. Other cities include, Green River population 11,788, Wamsutter population 467, Superior population 312 and Granger population 128. See all Sweetwater County cities & populated places.
Sweetwater County Populated Places
Cities, towns, neighborhoods & other populated places in Sweetwater County.
| City Name | Population | Title |
|---|---|---|
| Rock Springs | 22,943 | City in Sweetwater County, Wyoming, United States |
| Green River | 11,788 | River in Wyoming, Utah, and Colorado, in the United States, that is a tributary of the Colorado River |
| North Rock Springs | 2,207 | Census-designated place in Sweetwater County, Wyoming |
| Wamsutter | 467 | Town of the United States |
| Superior | 312 | Town of the United States |
| Granger | 128 | Town in Wyoming |
| Bairoil | 97 | Town of the United States |
Weather
Partly cloudy, with a low around 18. West wind 9 to 21 mph, with gusts as high as 31 mph.
7-Day ForecastOfficial website of Sweetwater County
Official Website- Green River
Demographics
According to census records, the population of Sweetwater County decreased by 2.66% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2000 | 37,613 | - | census |
| 2010 | 43,806 | 14.14% | census |
| 2011 | 43,986 | 0.41% | estimation process |
| 2012 | 45,002 | 2.26% | estimation process |
| 2013 | 45,157 | 0.34% | estimation process |
| 2014 | 44,948 | -0.46% | estimation process |
| 2015 | 44,719 | -0.51% | estimation process |
| 2016 | 44,222 | -1.12% | estimation process |
| 2017 | 43,464 | -1.74% | estimation process |
| 2018 | 42,858 | -1.41% | estimation process |
| 2019 | 42,343 | -1.22% | estimation process |
| 2020 | 42,673 | 0.77% | estimation process |
Wyoming Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Laramie County | 100,595 | County in the southeastern corner of Wyoming, United States |
| Natrona County | 80,815 | County in Wyoming, United States |
| Cheyenne | 64,742 | The most populous city in Laramie County, Wyoming. |
| Casper | 58,498 | The most populous city in Natrona County, Wyoming. |
| Campbell County | 46,676 | County in northeastern Wyoming, United States |
| Fremont County | 39,317 | County in western Wyoming, United States |
| Albany County | 38,950 | County in Wyoming, United States |
| Laramie | 32,661 | City in and county seat of Albany County, Wyoming, United States |
| Gillette | 32,220 | City in Campbell County, Wyoming, United States |
| Sheridan County | 30,863 | County in Wyoming, United States |
| Park County | 29,331 | County in Colorado, United States |
| Teton County | 23,497 | County in Wyoming, United States |
| Rock Springs | 22,943 | City in Sweetwater County, Wyoming, United States |
| Lincoln County | 20,253 | County in Wyoming, United States |
| Uinta County | 20,215 | County in Wyoming, United States |
| Sheridan | 18,095 | City in Wyoming, United States |