| County |
|---|
| Ada County |
| Adams County |
| Bannock County |
| Bear Lake County |
| Benewah County |
| Bingham County |
| Blaine County |
| Boise County |
| Bonner County |
| Bonneville County |
| Boundary County |
| Butte County |
| Camas County |
| Canyon County |
| Caribou County |
| Cassia County |
| Clark County |
| Clearwater County |
| Custer County |
| Elmore County |
| Franklin County |
| Fremont County |
| Gem County |
| Gooding County |
| Idaho County |
| Jefferson County |
| Jerome County |
| Kootenai County |
| Latah County |
| Lemhi County |
| Lewis County |
| Lincoln County |
| Madison County |
| Minidoka County |
| Nez Perce County |
| Oneida County |
| Owyhee County |
| Payette County |
| Power County |
| Shoshone County |
| Teton County |
| Twin Falls County |
| Valley County |
| Washington County |