Wyoming County Map
Labeled county boundary map and complete directory of all 23 counties in Wyoming (WY, State FIPS 56). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 23 counties in Wyoming. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
Wyoming County Statistics & Summary
Total Counties
23
Largest by Land Area
Sweetwater County
Smallest by Land Area
Hot Springs County
All 23 Counties in Wyoming (FIPS, County Seat & Official Website)
| County Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Albany County | 56001 | Laramie | 4,274.2 | 41.666°, -105.722° | Official Site |
| Big Horn County | 56003 | Basin | 3,137 | 44.525°, -107.995° | Official Site |
| Campbell County | 56005 | Gillette | 4,802.1 | 44.191°, -105.526° | Official Site |
| Carbon County | 56007 | Rawlins | 7,897.7 | 41.702°, -106.925° | Official Site |
| Converse County | 56009 | Douglas | 4,255 | 42.985°, -105.525° | Official Site |
| Crook County | 56011 | Sundance | 2,854.5 | 44.589°, -104.567° | Official Site |
| Fremont County | 56013 | Lander | 9,183.6 | 43.055°, -108.609° | Official Site |
| Goshen County | 56015 | Torrington | 2,225.6 | 42.090°, -104.353° | Official Site |
| Hot Springs County | 56017 | Thermopolis | 2,004.4 | 43.720°, -108.435° | Official Site |
| Johnson County | 56019 | Buffalo | 4,154.2 | 44.044°, -106.588° | Official Site |
| Laramie County | 56021 | Cheyenne | 2,685.9 | 41.293°, -104.660° | Official Site |
| Lincoln County | 56023 | Kemmerer | 4,075.3 | 42.230°, -110.683° | Official Site |
| Natrona County | 56025 | Casper | 5,340.5 | 42.981°, -106.771° | Official Site |
| Niobrara County | 56027 | Lusk | 2,626 | 43.062°, -104.468° | Official Site |
| Park County | 56029 | Cody | 6,939 | 44.492°, -109.594° | Official Site |
| Platte County | 56031 | Wheatland | 2,081.5 | 42.132°, -104.954° | Official Site |
| Sheridan County | 56033 | Sheridan | 2,523.4 | 44.781°, -106.881° | Official Site |
| Sublette County | 56035 | Pinedale | 4,886.5 | 42.768°, -109.916° | Official Site |
| Sweetwater County | 56037 | Green River | 10,427 | 41.660°, -108.876° | Official Site |
| Teton County | 56039 | Jackson | 3,996.8 | 44.049°, -110.426° | Official Site |
| Uinta County | 56041 | Evanston | 2,081.7 | 41.285°, -110.559° | Official Site |
| Washakie County | 56043 | Worland | 2,238.7 | 43.879°, -107.669° | Official Site |
| Weston County | 56045 | Newcastle | 2,398 | 43.846°, -104.570° | Official Site |
How Wyoming Counties and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, Wyoming (WY) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 56 and covers 97,089 square miles of land area across 23 counties in the Mountain Time (MT) zone (with Cheyenne as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 56 with a 3-digit county code (ranging alphabetically from Albany County at 56001 to Weston County at 56045).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in Wyoming carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in Wyoming are determined by the legal county boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 23 administrative seats and 23 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which Wyoming county a specific home or business address sits in? Open the Blank Map of Wyoming, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering Wyoming: