Originally there were five counties in the Wyoming Territory. In 1867 Laramie and Carter county was established. In 1868 Albany and Carbon County were established. Uinta county, an annexed portion of Idaho and Utah, was established in this period. The county extends from Montana (including Yellowstone Park) to the Wyoming-Utah boundary. On July 10, 1890,  Wyoming state was admitted to the Union as the 44th state with 13 counties. After the statehood of Wyoming, ten more counties were created. The FIPS code (Federal Information Processing Standard) of Wyoming State is 56, which, when combined with any three-digit county code, would be written as 56XXX.

How Many Counties in Wyoming

The US state of Wyoming has 23 counties. Check this Wyoming County Map which provides the location of all counties on the Wyoming map.

Counties of  Wyoming

• Albany County Map, Wyoming
• Big Horn County Map, Wyoming
• Campbell County Map, Wyoming
• Carbon County Map, Wyoming
• Converse County Map, Wyoming
• Crook County Map, Wyoming
• Fremont County Map, Wyoming
• Goshen County Map, Wyoming
• Hot Springs County Map, Wyoming
• Johnson County Map, Wyoming
• Laramie County Map, Wyoming
• Lincoln County Map, Wyoming
• Natrona County Map, Wyoming
• Niobrara County Map, Wyoming
• Park County Map, Wyoming
• Platte County Map, Wyoming
• Sheridan County Map, Wyoming
• Sublette County Map, Wyoming
• Sweetwater County Map, Wyoming
• Teton County Map, Wyoming
• Uinta County Map, Wyoming
• Washakie County Map, Wyoming
• Weston County Map, Wyoming

County Name Changes

• On December 1, 1869, Carter County was renamed Sweetwater County.
• In 1911, Hanover County existed for seven days before being renamed Washakie County.
• In 1875 Pease County was formed and renamed Johnson County in 1879.

Oldest and Newest Counties of Wyoming

The oldest and the first county of Wyoming were created on January 9, 1867, was Laramie County. The Newest and last Counties of Wyoming state were made on February 15, 1921, are Teton County (organized in 1922) and Sublette County (organized in 1923).

Largest and Smallest County by Area in Wyoming state

The biggest county in Wyoming is sweetwater county covering an area of 10,426 square miles (27,000 km2). The smallest county of Wyoming is Hot Springs County, covering 2004 square miles (5,190 km2). 

Best county to live in Wyoming

Some of the best counties to live in the Wyoming State United States are Albany County, Teton County, Sheridan County, Park County, Laramie County and Fremont the County.

Most Populated and Least Populated County of Wyoming

Laramie County is the most populated county (2020 census) in Wyoming, and Niobrara County is the least populated county (2020 census) in Wyoming state of the United States.

Information about maps of all Counties of Wyoming

The maps of all counties of Wyoming are available on the website describing facts about counties. The map shows the location of the county within the state, its county seat, and state and county boundary. These maps can be used in multiple ways for various purposes.