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. | 32,014 | 4,274 sq mi (11,070 km 2) |
 |
|---|---|---|---|---|---|---|---|---|
| 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 | 3,137 sq mi (8,125 km 2) |
 |
| 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 | 4,797 sq mi (12,424 km 2) |
 |
| Carbon County | 007 | Rawlins | 1868 | One of the original five counties. | The vast coal beds in the county. | 15,639 | 7,897 sq mi (20,453 km 2) |
 |
| Converse County | 009 | Douglas | 1888 | Parts of Albany County and Laramie County. | A.R. Converse, a banker and rancher from Cheyenne, Wyoming. | 12,052 | 4,255 sq mi (11,020 km 2) |
 |
| Crook County | 011 | Sundance | 1875 | Parts of Laramie County and Albany County. | General George Crook (1820-1829), who served in the American Civil War and the Indian Wars. | 5,887 | 2,859 sq mi (7,405 km 2) |
 |
| 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 | 9,183 sq mi (23,784 km 2) |
 |
| Goshen County | 015 | Torrington | 1911 | Part of Laramie County. | The Land of Goshen, a Biblical paradise. | 12,538 | 2,225 sq mi (5,763 km 2) |
 |
| 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 | 2,004 sq mi (5,190 km 2) |
 |
| Johnson County | 019 | Buffalo | 1875 | Parts of Carbon County and Sweetwater County. | E.P. Johnson, a lawyer from Cheyenne, Wyoming. | 7,075 | 4,166 sq mi (10,790 km 2) |
 |
| Laramie County | 021 | Cheyenne | 1867 | One of the original five counties. | Jacques La Ramie (1785?–1821), a French-Canadian fur trapper. | 81,607 | 2,686 sq mi (6,957 km 2) |
 |
| Lincoln County | 023 | Kemmerer | 1911 | Part of Uinta County. | Abraham Lincoln (1809-1865), U.S. President (1861-1865) | 14,573 | 4,069 sq mi (10,539 km 2) |
 |
| 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 | 5,340 sq mi (13,831 km 2) |
 |
| 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 | 2,626 sq mi (6,801 km 2) |
 |
| Park County | 029 | Cody | 1909 | Part of Big Horn County. | Yellowstone National Park, which includes most of the county. | 25,786 | 6,943 sq mi (17,982 km 2) |
 |
| Platte County | 031 | Wheatland | 1911 | Part of Laramie County. | North Platte River. Plate is French for flat. | 8,807 | 2,085 sq mi (5,400 km 2) |
 |
| Sheridan County | 033 | Sheridan | 1888 | Part of Johnson County. | Philip Sheridan, American Civil War general. | 26,560 | 2,523 sq mi (6,535 km 2) |
 |
| Sublette County | 035 | Pinedale | 1921 | Parts of Fremont County and Lincoln County. | William Sublette, pioneer. | 5,920 | 4,882 sq mi (12,644 km 2) |
 |
| 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 | 10,426 sq mi (27,003 km 2) |
 |
| Teton County | 039 | Jackson | 1921 | Part of Lincoln County. | Teton Range, a small mountain range of the Rocky Mountains Wyoming-Idaho border | 18,251 | 4,008 sq mi (10,381 km 2) |
 |
| 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 | 2,082 sq mi (5,392 km 2) |
 |
| Washakie County | 043 | Worland | 1911 | Part of Big Horn County | Washakie (1804-1900), a leader of Shoshone Native American tribe. | 8,289 | 2,240 sq mi (5,802 km 2) |
 |
| Weston County | 045 | Newcastle | 1890 | Part of Crook County | John B. Weston, railroad promoter. | 6,644 | 2,398 sq mi (6,211 km 2) |
 |
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| It has been suggested that List of Wyoming county name etymologies be merged into this article or section. (Discuss) |
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. | 32,014 | 4,274 mi² (11,066 km²) |
 |
|---|---|---|---|---|---|---|---|---|
| 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 | 3,137 sq mi (8,125 km²) |
 |
| 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 | 4,797 sq mi (12,424 km²) |
 |
| Carbon County | 007 | Rawlins | 1868 | One of the original five counties. | The vast coal beds in the county. | 15,639 | 7,897 sq mi (20,453 km²) |
 |
| Converse County | 009 | Douglas | 1888 | Parts of Albany County and Laramie County. | A.R. Converse, a banker and rancher from Cheyenne. | 12,052 | 4,255 sq mi (11,020 km²) |
 |
| Crook County | 011 | Sundance | 1875 | Parts of Laramie County and Albany County. | General George Crook (1820-1829), who served in the American Civil War and the Indian Wars. | 5,887 | 2,859 sq mi (7,405 km²) |
 |
| 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 | 9,183 sq mi (23,784 km²) |
 |
| Goshen County | 015 | Torrington | 1911 | Part of Laramie County. | The Land of Goshen, a Biblical paradise. | 12,538 | 2,225 sq mi (5,763 km²) |
 |
| 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 | 2,004 sq mi (5,190 km²) |
 |
| Johnson County | 019 | Buffalo | 1875 | Parts of Carbon County and Sweetwater County. | E.P. Johnson, a lawyer from Cheyenne. | 7,075 | 4,166 sq mi (10,790 km²) |
 |
| Laramie County | 021 | Cheyenne | 1867 | One of the original five counties. | Jacques La Ramie (1785?–1821), a French-Canadian fur trapper. | 81,607 | 2,686 sq mi (6,957 km²) |
 |
| Lincoln County | 023 | Kemmerer | 1911 | Part of Uinta County. | Abraham Lincoln (1805-1969), U.S. President (1861-1865) | 14,573 | 4,069 sq mi (10,539 km²) |
 |
| 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 | 5,340 sq mi (13,831 km²) |
 |
| 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 | 2,626 sq mi (6,801 km²) |
 |
| Park County | 029 | Cody | 1909 | Part of Big Horn County. | Yellowstone National Park, which incorparates most of the county. | 25,786 | 6,943 sq mi (17,982 km²) |
 |
| Platte County | 031 | Wheatland | 1911 | Part of Laramie County. | North Platte River. Platte is French for flat. | 8,807 | 2,085 sq mi (5,400 km²) |
 |
| Sheridan County | 033 | Sheridan | 1888 | Part of Johnson County. | Philip Sheridan, American Civil War general. | 26,560 | 2,523 sq mi (6,535 km²) |
 |
| Sublette County | 035 | Pinedale | 1921 | Parts of Fremont County and Lincoln County. | William Sublette, pioneer. | 5,920 | 4,882 sq mi (12,644 km²) |
 |
| 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 | 10,426 sq mi (27,003 km²) |
 |
| Teton County | 039 | Jackson | 1921 | Part of Lincoln County. | Teton Range, a small mountain range of the Rocky Mountains Wyoming-Idaho border | 18,251 | 4,008 sq mi (10,381 km²) |
 |
| 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 | 2,082 sq mi (5,392 km²) |
 |
| Washakie County | 043 | Worland | 1911 | Part of Big Horn County | Washakie (1804-1900), a leader of Shoshone Native American tribe. | 8,289 | 2,240 sq mi (5,802 km²) |
 |
| Weston County | 045 | Newcastle | 1890 | Part of Crook County | John B. Weston, railroad promoter. | 6,644 | 2,398 sq mi (6,211 km²) |
 |
| Lists of counties in the United States (parishes in Louisiana; boroughs and census areas in Alaska) |
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| This page uses content from the English language Wikipedia. The original content was at List of counties in Wyoming. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License. |
   | Name Derivations of Wyoming Counties - The GoWYLD! Guide to Wyoming Counties |
| | NACo - Find a county - NACo | Find a County |
| | EPA County FIPS Code Listing - EPA | Envirofacts | County FIPS Code Listing |
| | Wyoming QuickFacts - Wyoming QuickFacts from the US Census Bureau |
| | FIPS Publish 6-4 - FIPS 6-4 - County Names and Codes of the US |
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