 |
|
|
|
|
|
| County | Date Formed | Parent County | County Seat | County Coordinator |
| Albany | 1858 | Original County | Laramie |
 |
| Big Horn | 1890 | Fremont, Johnson | Basin |
|
| Campbell | 1911 | Crook, Weston | Gillette |
|
| Carbon | 1868 | Original County | Rawlins |
|
| Converse | 1888 | Laramie, Albany | Douglas |
|
| Crook | 1885 | Pease | Sundance |
|
| Fremont | 1884 | Sweetwater | Lander |
|
| Goshen | 1911 | Platte, Laramie | Torrington | Colleen Pustola |
| Hot Springs | 1911 | Fremont | Thermopolis | Billie Erin Walsh |
| Johnson | 1875 | Pease | Buffalo | Rebecca Maloney |
| Laramie | 1867 | Original County | Cheyenne |
|
| Lincoln | 1913 | Uinta | Kemmerer |
|
| Natrona | 1888 | Carbon | Casper | Bob Jenkins |
| Niobrara | 1911 | Converse | Lusk |
|
| Park | 1909 | Big Horn | Cody |
|
| Platte | 1913 | Laramie | Wheatland |
|
| Sheridan | 1888 | Johnson | Sheridan | Rebecca Maloney |
| Sublette | 1921 | Fremont | Pinedale |
|
| Sweetwater | 1867 | Originally Carter County | Green River | Angela M. Cable |
| Teton | 1921 | Lincoln | Jackson |
|
| Uinta | 1869 | Original County | Evanston |
|
| Washakie | 1911 | Big Horn, Johnson | Worland |
|
| Weston | 1890 | Crook | Newcastle |
|
| Wind River Reservation | Est. 1851 | Sweetwater, Fremont | Ft. Washakie | Rebecca Maloney |
| Unknown County | Rebecca Maloney |
