This is a list of counties in Wyoming. There are 23 counties in the U.S. 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.[1] On July 10, 1890, Wyoming was admitted to the Union with thirteen counties.[1]
Three counties were renamed after their creation. Carter County was renamed Sweetwater County on December 1, 1869.[2] Hanover County existed for seven days in 1911 before it was renamed Washakie County.[3] Pease County, formed in 1875, was renamed Johnson County in 1879.[3]
The Federal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry.[4] Wyoming's code is 56, which when combined with any county code would be written as 56XXX. The FIPS code for each county links to census data for that county.[5]
County |
FIPS Code [5] |
County Seat [6] |
Created [1] |
Formed from [1] |
Etymology [7] |
Population [6][8] |
Area [6][8] |
Map |
Albany County | 001 | Laramie | 1868 | One of the original five counties. | City of Albany, New York, from which early settlers hailed. | 32,014 | ( 11,070 km2) |
4,274 sq mi|
Big Horn County | 003 | Basin | 1896 | Parts of Sheridan County, Johnson County, and Fremont County. | Big Horn Mountains, a mountain range extending into northern Wyoming | 11,461 | ( 8,125 km2) |
3,137 sq mi|
Campbell County | 005 | Gillette | 1911 | Parts of Weston County and Crook County. | John Allen Campbell (1835-1880), first governor of the Wyoming Territory (1869-1875) | 33,698 | ( 12,424 km2) |
4,797 sq mi|
Carbon County | 007 | Rawlins | 1868 | One of the original five counties. | The vast coal beds in the county. | 15,639 | ( 20,453 km2) |
7,897 sq mi|
Converse County | 009 | Douglas | 1888 | Parts of Albany County and Laramie County. | A.R. Converse, a banker and rancher from Cheyenne, Wyoming. | 12,052 | ( 11,020 km2) |
4,255 sq mi|
Crook County | 011 | Sundance | 1875 | Parts of Laramie County and Albany County. | General George Crook (1828-1890), who served in the American Civil War and the Indian Wars. | 5,887 | ( 7,405 km2) |
2,859 sq mi|
Fremont County | 013 | Lander | 1884 | Part of Sweetwater County. | John C. Frémont (1813-1890), explorer, U.S. Senator for California, and the first presidential candidate of a major party to run on a platform in opposition to slavery | 35,804 | ( 23,784 km2) |
9,183 sq mi|
Goshen County | 015 | Torrington | 1911 | Part of Laramie County. | The Land of Goshen, a Biblical paradise. | 12,538 | ( 5,763 km2) |
2,225 sq mi|
Hot Springs County | 017 | Thermopolis | 1911 | Parts of Fremont County, Big Horn County, and Park County. | The hot springs at Thermopolis within the county borders. | 4,882 | ( 5,190 km2) |
2,004 sq mi|
Johnson County | 019 | Buffalo | 1875 | Parts of Carbon County and Sweetwater County. | E.P. Johnson, a lawyer from Cheyenne, Wyoming. | 7,075 | ( 10,790 km2) |
4,166 sq mi|
Laramie County | 021 | Cheyenne | 1867 | One of the original five counties. | Jacques La Ramee (1785?–1821), a French-Canadian fur trapper. | 81,607 | ( 6,957 km2) |
2,686 sq mi|
Lincoln County | 023 | Kemmerer | 1911 | Part of Uinta County. | Abraham Lincoln (1809-1865), U.S. President (1861-1865) | 14,573 | ( 10,539 km2) |
4,069 sq mi|
Natrona County | 025 | Casper | 1888 | Part of Carbon County. | The natron, or soda deposits found within the county's borders. Natrona means natron in Spanish. | 66,533 | ( 13,831 km2) |
5,340 sq mi|
Niobrara County | 027 | Lusk | 1911 | Part of Converse County. | The Niobrara River, which flows through the state. Niobrara is Omaha for flat or broad river. | 2,407 | ( 6,801 km2) |
2,626 sq mi|
Park County | 029 | Cody | 1909 | Part of Big Horn County. | Yellowstone National Park, which includes most of the county. | 25,786 | ( 17,982 km2) |
6,943 sq mi|
Platte County | 031 | Wheatland | 1911 | Part of Laramie County. | North Platte River. Plate is French for flat. | 8,807 | ( 5,400 km2) |
2,085 sq mi|
Sheridan County | 033 | Sheridan | 1888 | Part of Johnson County. | Philip Sheridan, American Civil War general. | 26,560 | ( 6,535 km2) |
2,523 sq mi|
Sublette County | 035 | Pinedale | 1921 | Parts of Fremont County and Lincoln County. | William Sublette, pioneer and fur trapper. | 5,920 | ( 12,644 km2) |
4,882 sq mi|
Sweetwater County | 037 | Green River | 1867 | One of the original five counties. | Sweetwater River (a tributary of the North Platte River), which flows through the state. | 37,613 | ( 27,003 km2) |
10,426 sq mi|
Teton County | 039 | Jackson | 1921 | Part of Lincoln County. | Teton Range, a small mountain range of the Rocky Mountains Wyoming-Idaho border | 18,251 | ( 10,381 km2) |
4,008 sq mi|
Uinta County | 041 | Evanston | 1869 | One of the original five counties. | The Uintah Mountains, named in turn after the Uintah Native American people. | 19,742 | ( 5,392 km2) |
2,082 sq mi|
Washakie County | 043 | Worland | 1911 | Part of Big Horn County | Washakie (1804-1900), a leader of Shoshone Native American tribe. | 8,289 | ( 5,802 km2) |
2,240 sq mi|
Weston County | 045 | Newcastle | 1890 | Part of Crook County | John B. Weston, who was responsible for bringing the first railroad to the area. | 6,644 | ( 6,211 km2) |
2,398 sq mi
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