| County |
|---|
| Adams County |
| Alamosa County |
| Arapahoe County |
| Archuleta County |
| Baca County |
| Bent County |
| Boulder County |
| Chaffee County |
| Cheyenne County |
| Clear Creek County |
| Conejos County |
| Costilla County |
| Crowley County |
| Custer County |
| Delta County |
| Denver County |
| Dolores County |
| Douglas County |
| Eagle County |
| El Paso County |
| Elbert County |
| Fremont County |
| Garfield County |
| Gilpin County |
| Grand County |
| Gunnison County |
| Hinsdale County |
| Huerfano County |
| Jackson County |
| Jefferson County |
| Kiowa County |
| Kit Carson County |
| La Plata County |
| Lake County |
| Larimer County |
| Las Animas County |
| Lincoln County |
| Logan County |
| Mesa County |
| Mineral County |
| Moffat County |
| Montezuma County |
| Montrose County |
| Morgan County |
| Otero County |
| Ouray County |
| Park County |
| Phillips County |
| Pitkin County |
| Prowers County |
| Pueblo County |
| Rio Blanco County |
| Rio Grande County |
| Routt County |
| Saguache County |
| San Juan County |
| San Miguel County |
| Sedgwick County |
| Summit County |
| Teller County |
| Washington County |
| Weld County |
| Yuma County |