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Wyoming Counties

There are twenty-three Counties in the state of Wyoming. There were originally five Counties in the Wyoming Territory: Laramie and Carter, established in 1867; Carbon and Albany established in 1868; and Uinta, an annexed portion of Utah and Idaho, extending from Montana (including Yellowstone Park) to the Wyoming-Utah boundary. On July 10, 1890, Wyoming was admitted to the Union with thirteen counties.

Sublette County, Wyoming

Sublette County Education, Geography, and History

Sublette County, Wyoming Courthouse

Sublette County is a county located in the state of Wyoming. Based on the 2010 census, the population was 10,247. The county seat is Pinedale. It is a sparsely populated rural county in western Wyoming, along the Green River.

Etymology - Origin of Sublette County Name

Named for William L. Sublette, pioneer fur trader.


County QuickFacts: CensusBureau Quick Facts

Sublette County History

Sublette County was created February 15, 1921, with land detached from Fremont County and Lincoln County, and organized in 1923. Historically, the area was important to the fur trade, and the county itself takes its name from one of Wyoming's early fur traders, William L. Sublette

Historically, the area was important to the fur trade, and the county itself takes its name from one of Wyoming's early fur traders, William L. Sublett. Today the county celebrates its fur trade heritage with the Museum of the Mountain Man in Pinedale.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 4,936 square miles (12,783 km2), of which, 4,883 square miles (12,646 km2) of it is land and 53 square miles (137 km2) of it (1.08%) is water.

Sublette County is the newest county in Wyoming, formed in 1921. The largest town, Pinedale, is the county seat. In all, the total population of the county is approximately 5,000 people. The county encompasses approximately 4,876 square miles. Over 80% of the county is public land. Fifteen of Wyoming's highest peaks, including Gannett the highest, are within the county. Three mountain ranges and two wilderness areas form the west, north and eastern borders. The larger towns in the county are Pinedale, Big Piney and Marbleton. The smaller towns, with less than 150 residents, are Boulder, Bondurant, Cora, and Daniel.

Neighboring Counties

Bordering counties are as follows:

  • Fremont County (east)
  • Sweetwater County (southeast)
  • Lincoln County (southwest)
  • Teton County (northwest)


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