The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
| County | Diversity Index | |
|---|---|---|
| 1. | Clark County | 81.8 |
| 2. | Humboldt County | 66.7 |
| 3. | Washoe County | 66.2 |
| 4. | Mineral County | 63.0 |
| 5. | Elko County | 62.9 |
| 6. | Carson City | 62.7 |
| 7. | Pershing County | 61.2 |
| 8. | Lander County | 58.4 |
| 9. | Esmeralda County | 57.1 |
| 10. | Churchill County | 54.2 |
| 11. | Lyon County | 53.8 |
| 12. | White Pine County | 51.6 |
| 13. | Nye County | 51.3 |
| 14. | Douglas County | 41.9 |
| 15. | Eureka County | 41.3 |
| 16. | Lincoln County | 35.0 |
| 17. | Storey County | 32.6 |
