The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
| County | Housing Affordability Index | |
|---|---|---|
| 1. | Blaine County | 91 |
| 2. | Boise County | 100 |
| 3. | Lemhi County | 109 |
| 4. | Valley County | 111 |
| 5. | Teton County | 113 |
| 6. | Latah County | 113 |
| 7. | Kootenai County | 114 |
| 8. | Madison County | 114 |
| 9. | Bonner County | 117 |
| 10. | Camas County | 117 |
| 11. | Owyhee County | 120 |
| 12. | Nez Perce County | 122 |
| 13. | Franklin County | 123 |
| 14. | Gem County | 123 |
| 15. | Jerome County | 124 |
| 16. | Adams County | 128 |
| 17. | Custer County | 132 |
| 18. | Idaho County | 133 |
| 19. | Washington County | 134 |
| 20. | Ada County | 135 |
