Sweetwater County
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Rock Springs City Hall, 2007
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Location within the U.S. state of Wyoming
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Wyoming's location within the U.S.
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| Coordinates: 41°40′N 108°53′W / 41.66°N 108.89°W / 41.66; -108.89 | |
| Country |  United States |
| State |  Wyoming |
| Founded | December 17, 1867 |
| Named for | Sweetwater River |
| Seat | Green River |
| Largest city | Rock Springs |
| Area | |
| • Total | 10,491 sq mi (27,170 km2) |
| • Land | 10,427 sq mi (27,010 km2) |
| • Water | 64 sq mi (170 km2) 0.6% |
| Population
(2020)
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| • Total | 42,272 |
| • Density | 4.0/sq mi (1.6/km2) |
| Time zone | UTC−7 (Mountain) |
| • Summer (DST) | UTC−6 (MDT) |
| Area code | 307 |
| Congressional district | At-large |
| Website | www |
Sweetwater County is a county in southwestern Wyoming, United States.[1] As of the 2020 United States Census, the population was 42,272, making it the fourth-most populous county in Wyoming.[2] Its county seatisGreen River.[3] By area, it is the largest county in Wyoming. Its southern boundary line abuts the north lines of the states of Colorado and Utah.
Sweetwater County comprises the Rock Springs, Green River, Wyoming Micropolitan Statistical Area.
Sweetwater County was created on December 17, 1867, as a county within the Dakota Territory.[4] The county was formed of territory partitioned from Laramie County. The county was originally named Carter County for Judge W.A. Carter of Fort Bridger[5] In 1869, the newly established legislature of the Wyoming Territory renamed the county for the Sweetwater River.
Also in 1869, Uinta County was organized with land ceded by Sweetwater County. Johnson County, originally named Pease County, was formed from parts of Sweetwater and Carbon counties in 1875. In 1884, Sweetwater County lost territory when Fremont County was created. Sweetwater County also lost territory when its boundary with Carbon County was adjusted in 1886. County boundaries were also adjusted in 1909, 1911, and 1951.
South Pass City was the county seat from 1867 until 1873, when the county seat was moved to Green River.
According to the U.S. Census Bureau, the county has a total area of 10,491 square miles (27,170 km2), of which 10,427 square miles (27,010 km2) is land and 64 square miles (170 km2) (0.6%) is water.[6] The largest county in Wyoming, Sweetwater County is larger than six states and is the eighth-largest county in the United States (not including boroughs and census areas in Alaska). Most of the Great Divide Basin lies within the county, comprising the county's northeast quadrant. The Continental Divide runs through the county.
Interstate 80
I-80 BL I-80 BL
U.S. Highway 30
U.S. Highway 191
Wyoming Highway 28
Wyoming Highway 370
Wyoming Highway 371
Wyoming Highway 372
Wyoming Highway 414
Wyoming Highway 430
Wyoming Highway 530
Wyoming Highway 789| Census | Pop. | Note | %± |
|---|---|---|---|
| 1870 | 1,916 | — | |
| 1880 | 2,561 | 33.7% | |
| 1890 | 4,941 | 92.9% | |
| 1900 | 8,455 | 71.1% | |
| 1910 | 11,575 | 36.9% | |
| 1920 | 13,640 | 17.8% | |
| 1930 | 18,165 | 33.2% | |
| 1940 | 19,407 | 6.8% | |
| 1950 | 22,017 | 13.4% | |
| 1960 | 17,920 | −18.6% | |
| 1970 | 18,391 | 2.6% | |
| 1980 | 41,723 | 126.9% | |
| 1990 | 38,823 | −7.0% | |
| 2000 | 37,613 | −3.1% | |
| 2010 | 43,806 | 16.5% | |
| 2020 | 42,272 | −3.5% | |
| 2023 (est.) | 41,249 | [7] | −2.4% |
| US Decennial Census[8] 1870–2000[9] 2010–2020[2] | |||
As of the 2000 United States Census,[10] of 2000, there were 37,613 people, 14,105 households, and 10,099 families in the county. The population density was 4 people per square mile (1.5 people/km2). There were 15,921 housing units at an average density of 2 units per square mile (0.77 units/km2). The racial makeup of the county was 91.62% White, 0.73% BlackorAfrican American, 1.01% Native American, 0.64% Asian, 0.04% Pacific Islander, 3.59% from other races, and 2.37% from two or more races. 9.42% of the population were HispanicorLatino of any race. 16.4% are of English, 16.2% German, 9% Irish and 5% Italian ancestry.[11]
There were 14,105 households, out of which 38.20% had children under the age of 18 living with them, 57.80% were married couples living together, 9.20% had a female householder with no husband present, and 28.40% were non-families. 23.60% of all households were made up of individuals, and 6.90% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.11.
The county population contained 28.90% under the age of 18, 10.10% from 18 to 24, 29.30% from 25 to 44, 23.70% from 45 to 64, and 8.00% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 102.40 males. For every 100 females age 18 and over, there were 101.10 males.
The median income for a household in the county was $46,537, and the median income for a family was $54,173. Males had a median income of $45,678 versus $22,440 for females. The per capita income for the county was $19,575. About 5.40% of families and 7.80% of the population were below the poverty line, including 9.20% of those under age 18 and 7.00% of those age 65 or over.
As of the 2010 United States Census, there were 43,806 people, 16,475 ;households, and 11,405 families in the county.[12] The population density was 4.2 people per square mile (1.6 people/km2). There were 18,735 housing units at an average density of 1.8 units per square mile (0.69 units/km2).[13] The racial makeup of the county was 88.5% white, 1.0% American Indian, 1.0% black or African American, 0.8% Asian, 0.1% Pacific islander, 6.4% from other races, and 2.3% from two or more races. Those of Hispanic or Latino origin made up 15.3% of the population.[12] In terms of ancestry, 22.4% were German, 19.0% were English, 13.0% were Irish, 7.4% were Italian, and 4.4% were American.[14]
Of the 16,475 households, 36.7% had children under the age of 18 living with them, 53.5% were married couples living together, 9.0% had a female householder with no husband present, 30.8% were non-families, and 24.0% of all households were made up of individuals. The average household size was 2.62 and the average family size was 3.09. The median age was 32.8 years.[12]
The median income for a household in the county was $69,828 and the median income for a family was $79,527. Males had a median income of $65,174 versus $31,738 for females. The per capita income for the county was $30,961. About 6.1% of families and 8.2% of the population were below the poverty line, including 12.0% of those under age 18 and 5.0% of those age 65 or over.[15]
Religion in Sweetwater County,according to ARDA (2020) [1]
Sweetwater County is home to Sweetwater County School District Number 1 and Sweetwater County School District Number 2. Sweetwater is also home to Western Wyoming Community College which is located in Rock Springs.
Sweetwater County was a Democratic stronghold in Wyoming until recent years, voting Democratic in eleven consecutive presidential elections between 1928 and 1968, after supporting Progressive Robert La Follette Sr. in 1924. In 1928, 1952, 1956 and 1976 it was the only Wyoming county to support the Democratic presidential nominee.
Nonetheless, no Democratic presidential candidate has won Sweetwater County since Bill Clinton in 1996. In 2016, Hillary Clinton won just 18.9 percent of the vote in the county.[26] At the state level, Sweetwater County is represented by one Democrat, four Republicans and one Libertarian in the Wyoming House of Representatives, and three Republicans in the Wyoming Senate.
| Year | Republican | Democratic | Third party | |||
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| No. | % | No. | % | No. | % | |
| 2020 | 12,229 | 73.66% | 3,823 | 23.03% | 551 | 3.32% |
| 2016 | 12,154 | 70.95% | 3,231 | 18.86% | 1,745 | 10.19% |
| 2012 | 11,428 | 67.64% | 4,774 | 28.26% | 693 | 4.10% |
| 2008 | 10,360 | 62.02% | 5,762 | 34.50% | 581 | 3.48% |
| 2004 | 10,653 | 65.47% | 5,208 | 32.01% | 411 | 2.53% |
| 2000 | 9,425 | 60.07% | 5,521 | 35.19% | 745 | 4.75% |
| 1996 | 5,591 | 35.76% | 7,088 | 45.34% | 2,955 | 18.90% |
| 1992 | 4,476 | 30.02% | 6,417 | 43.04% | 4,017 | 26.94% |
| 1988 | 6,780 | 49.47% | 6,720 | 49.03% | 205 | 1.50% |
| 1984 | 8,308 | 60.59% | 5,230 | 38.14% | 174 | 1.27% |
| 1980 | 6,265 | 51.92% | 4,728 | 39.18% | 1,074 | 8.90% |
| 1976 | 4,937 | 46.69% | 5,575 | 52.72% | 62 | 0.59% |
| 1972 | 5,175 | 58.05% | 3,713 | 41.65% | 27 | 0.30% |
| 1968 | 2,726 | 36.60% | 4,086 | 54.85% | 637 | 8.55% |
| 1964 | 1,944 | 24.57% | 5,969 | 75.43% | 0 | 0.00% |
| 1960 | 2,545 | 32.04% | 5,398 | 67.96% | 0 | 0.00% |
| 1956 | 3,355 | 41.41% | 4,747 | 58.59% | 0 | 0.00% |
| 1952 | 3,567 | 38.05% | 5,807 | 61.95% | 0 | 0.00% |
| 1948 | 2,538 | 31.39% | 5,146 | 63.65% | 401 | 4.96% |
| 1944 | 2,623 | 31.90% | 5,599 | 68.10% | 0 | 0.00% |
| 1940 | 2,439 | 26.82% | 6,637 | 72.98% | 18 | 0.20% |
| 1936 | 1,797 | 22.19% | 6,232 | 76.97% | 68 | 0.84% |
| 1932 | 2,043 | 29.26% | 4,637 | 66.40% | 303 | 4.34% |
| 1928 | 2,528 | 45.15% | 2,974 | 53.12% | 97 | 1.73% |
| 1924 | 2,119 | 42.16% | 688 | 13.69% | 2,219 | 44.15% |
| 1920 | 1,744 | 54.14% | 1,216 | 37.75% | 261 | 8.10% |
| 1916 | 1,287 | 43.79% | 1,496 | 50.90% | 156 | 5.31% |
| 1912 | 888 | 35.76% | 916 | 36.89% | 679 | 27.35% |
| 1908 | 1,299 | 58.49% | 637 | 28.68% | 285 | 12.83% |
| 1904 | 1,473 | 71.37% | 464 | 22.48% | 127 | 6.15% |
| 1900 | 1,101 | 59.80% | 740 | 40.20% | 0 | 0.00% |
| 1896 | 754 | 42.19% | 996 | 55.74% | 37 | 2.07% |
| 1892 | 674 | 47.03% | 0 | 0.00% | 759 | 52.97% |
County commissioners
| Name | Party | Term |
|---|---|---|
| Randal "Doc" Wendling | Republican | 2015- |
| Wally Johnson | Republican | 2005- |
| Jeffrey Smith (chair) | Republican | 2019- |
| Roy Lloyd | Republican | 2019- |
| Lauren Schoenfeld | Republican | 2019- |
Sweetwater County is served by two print publications: Rock Springs Daily Rocket-Miner and The Green River Star (a weekly newspaper published in Green River).
Sweetwater County is served by a hyperlocal news websites, SweetwaterNOW.com and wyo4news.com.
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Places adjacent to Sweetwater County, Wyoming
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Municipalities and communities of Sweetwater County, Wyoming, United States
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| Footnotes | ‡This populated place also has portions in an adjacent state | |
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