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Sweetwater County

Trip Planner USA  /  Wyoming  /  Sweetwater County
(190+ reviews from 7 attractions)
Museums Scenic Drive Parks
Sweetwater County is a county located in the U.S. state of Wyoming. As of the 2010 census, the population was 43,806. Its county seat is Green River. In area, it is the largest county in the state. It is in the southwestern part of Wyoming, north of the Colorado-Utah state line.Sweetwater County comprises the Rock Springs, WY Micropolitan Statistical Area.HistorySweetwater County was originally created on December 17, 1867 as a county within the Dakota Territory. The county was derived from land that was previously part of Laramie County. The county was originally named Carter County for Judge W.A. Carter of Fort Bridger 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 County and Carbon County in 1875. In 1884, Sweetwater County lost territory when Fremont County was created. Sweetwater County also lost territory when Carbon County was formed in 1886. At that point, the county achieved its present boundaries except for minor adjustments in 1909, 1911, and 1951.
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