Wyoming counties
Every county in Wyoming, with the ZIP codes recorded in each. Pick one to see its full ZIP code list.
- counties
- 23
- ZIP codes
- 195
All Wyoming counties
| County | ZIP codes | Largest city |
|---|---|---|
| Albany County | 11 | Laramie |
| Big Horn County | 12 | Basin |
| Campbell County | 7 | Gillette |
| Carbon County | 12 | Baggs |
| Converse County | 4 | Douglas |
| Crook County | 7 | Aladdin |
| Fremont County | 13 | Arapahoe |
| Goshen County | 9 | Fort Laramie |
| Hot Springs County | 2 | Kirby |
| Johnson County | 4 | Buffalo |
| Laramie County | 17 | Cheyenne |
| Lincoln County | 16 | Afton |
| Natrona County | 14 | Casper |
| Niobrara County | 4 | Lance Creek |
| Park County | 7 | Cody |
| Platte County | 5 | Chugwater |
| Sheridan County | 12 | Arvada |
| Sublette County | 6 | Big Piney |
| Sweetwater County | 12 | Rock Springs |
| Teton County | 8 | Jackson |
| Uinta County | 7 | Evanston |
| Washakie County | 2 | Ten Sleep |
| Weston County | 4 | Four Corners |
Scope every county-equivalent recorded in Wyoming. Source Census 2024 county Gazetteer (2024 Gazetteer) and GeoNames US postal codes (2026-07 postal dump). Updated . Names and boundaries follow the Census Bureau's current county-equivalent set, not the WY postal source's older names.