The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
| County | Wealth Index | |
|---|---|---|
| 1. | Clark County | 35 |
| 2. | Gem County | 48 |
| 3. | Idaho County | 48 |
| 4. | Oneida County | 48 |
| 5. | Owyhee County | 48 |
| 6. | Shoshone County | 48 |
| 7. | Washington County | 48 |
| 8. | Lincoln County | 49 |
| 9. | Jerome County | 50 |
| 10. | Custer County | 50 |
| 11. | Lemhi County | 50 |
| 12. | Gooding County | 51 |
| 13. | Madison County | 52 |
| 14. | Elmore County | 53 |
| 15. | Lewis County | 55 |
| 16. | Franklin County | 57 |
| 17. | Payette County | 57 |
| 18. | Minidoka County | 58 |
| 19. | Cassia County | 59 |
| 20. | Canyon County | 60 |
