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. | Costilla County | 76.3 |
| 2. | Denver County | 74.3 |
| 3. | Adams County | 73.8 |
| 4. | Alamosa County | 72.8 |
| 5. | Conejos County | 70.5 |
| 6. | Rio Grande County | 70.3 |
| 7. | Otero County | 70.2 |
| 8. | Pueblo County | 68.8 |
| 9. | Morgan County | 68.0 |
| 10. | Prowers County | 68.0 |
| 11. | Crowley County | 67.5 |
| 12. | Weld County | 65.8 |
| 13. | Bent County | 65.6 |
| 14. | Arapahoe County | 65.3 |
| 15. | Las Animas County | 65.0 |
| 16. | Lake County | 64.2 |
| 17. | Huerfano County | 62.9 |
| 18. | Saguache County | 62.8 |
| 19. | Garfield County | 60.2 |
| 20. | Eagle County | 59.9 |
