| County | FIPS |
|---|---|
| Albany County | 56001 |
| Big Horn County | 56003 |
| Campbell County | 56005 |
| Carbon County | 56007 |
| Converse County | 56009 |
| Crook County | 56011 |
| Fremont County | 56013 |
| Goshen County | 56015 |
| Hot Springs County | 56017 |
| Johnson County | 56019 |
| Laramie County | 56021 |
| Lincoln County | 56023 |
| Natrona County | 56025 |
| Niobrara County | 56027 |
| Park County | 56029 |
| Platte County | 56031 |
| Sheridan County | 56033 |
| Sublette County | 56035 |
| Sweetwater County | 56037 |
| Teton County | 56039 |
| Uinta County | 56041 |
| Washakie County | 56043 |
| Weston County | 56045 |