1. Ada County - Boise
2. Adams County - Council
3. Bannock County - Pocatello
4. Bear Lake County - Paris
5. Benewah County - St. Maries
6. Bingham County - Blackfoot
7. Blaine County - Hailey
8. Boise County - Idaho City
9. Bonner County - Sandpoint
10. Bonneville County - Idaho Falls
11. Boundary County - Bonners Ferry
12. Butte County - Arco
13. Camas County - Fairfield
14. Canyon County - Caldwell
15. Caribou County - Soda Springs
16. Cassia County - Burley
17. Clark County - Dubois
18. Clearwater County - Orofino
19. Custer County - Challis
20. Elmore County - Mountain Home
21. Franklin County - Preston
22. Fremont County - St. Anthony
23. Gem County - Emmett
24. Gooding County - Gooding
25. Idaho County - Grangeville
26. Jefferson County - Rigby
27. Jerome County - Jerome
28. Kootenai County - Coeur d'Alene
29. Latah County - Moscow
30. Lemhi County - Salmon
31. Lewis County - Nezperce
32. Lincoln County - Shoshone
33. Madison County - Rexburg
34. Minidoka County - Rupert
35. Nez Perce County - Lewiston
36. Oneida County - Malad City
37. Owyhee County - Murphy
38. Payette County - Payette
39. Power County - American Falls
40. Shoshone County - Wallace
41. Teton County - Driggs
42. Twin Falls County - Twin Falls
43. Valley County - Cascade
44. Washington County - Weiser

References

• Idaho Association of Counties