Alphabetical list of Wyoming counties
The land-area figures are rounded to the nearest square mile. Water area is shown separately so large lakes or coastal waters do not obscure the comparison.
| Name | FIPS code | Land area | Water area |
|---|---|---|---|
| Albany County | 56001 | 4,274 sq mi | 35 sq mi |
| Big Horn County | 56003 | 3,137 sq mi | 21 sq mi |
| Campbell County | 56005 | 4,802 sq mi | 4 sq mi |
| Carbon County | 56007 | 7,898 sq mi | 66 sq mi |
| Converse County | 56009 | 4,255 sq mi | 10 sq mi |
| Crook County | 56011 | 2,854 sq mi | 11 sq mi |
| Fremont County | 56013 | 9,184 sq mi | 82 sq mi |
| Goshen County | 56015 | 2,226 sq mi | 7 sq mi |
| Hot Springs County | 56017 | 2,004 sq mi | 2 sq mi |
| Johnson County | 56019 | 4,154 sq mi | 20 sq mi |
| Laramie County | 56021 | 2,686 sq mi | 2 sq mi |
| Lincoln County | 56023 | 4,075 sq mi | 19 sq mi |
| Natrona County | 56025 | 5,341 sq mi | 35 sq mi |
| Niobrara County | 56027 | 2,626 sq mi | 2 sq mi |
| Park County | 56029 | 6,939 sq mi | 26 sq mi |
| Platte County | 56031 | 2,081 sq mi | 29 sq mi |
| Sheridan County | 56033 | 2,523 sq mi | 3 sq mi |
| Sublette County | 56035 | 4,886 sq mi | 49 sq mi |
| Sweetwater County | 56037 | 10,427 sq mi | 64 sq mi |
| Teton County | 56039 | 3,997 sq mi | 220 sq mi |
| Uinta County | 56041 | 2,082 sq mi | 6 sq mi |
| Washakie County | 56043 | 2,239 sq mi | 4 sq mi |
| Weston County | 56045 | 2,398 sq mi | 2 sq mi |
Largest Wyoming counties by land area
These are the five largest mapped units in Wyoming by Census-reported land area:
- Sweetwater County — 10,427 square miles
- Fremont County — 9,184 square miles
- Carbon County — 7,898 square miles
- Park County — 6,939 square miles
- Natrona County — 5,341 square miles
How to read and use this map
County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.
For classroom or planning use, print directly from this page. If labels become crowded, choose landscape orientation and reduce page margins. The underlying vector lines remain crisp at different sizes.
Frequently asked questions
How many counties are in Wyoming?
Wyoming has 23 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.
Can I print this Wyoming county map?
Yes. Choose Print map and use landscape orientation for the widest map. Because the map is SVG, its boundary lines stay sharp when scaled.
Are these legal survey boundaries?
No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.
Map source
U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:20,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 15, 2026.