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.
| Name | County | Diversity Index | |
|---|---|---|---|
| 1. | Town of Flagler | Kit Carson | 7.3 |
| 2. | Town of Blue River | Summit | 9.9 |
| 3. | Allenspark Census Designated Place | Boulder | 11.5 |
| 4. | Mountain Meadows Census Designated Place | Boulder | 11.6 |
| 5. | Town of Jamestown | Boulder | 12.0 |
| 6. | Redvale Census Designated Place | Montrose | 12.0 |
| 7. | Town of Ward | Boulder | 12.2 |
| 8. | Tall Timber Census Designated Place | Boulder | 12.3 |
| 9. | Crisman Census Designated Place | Boulder | 12.3 |
| 10. | Town of Ophir | San Miguel | 12.5 |
| 11. | Sugarloaf Census Designated Place | Boulder | 12.5 |
| 12. | Gold Hill Census Designated Place | Boulder | 12.6 |
| 13. | Bark Ranch Census Designated Place | Boulder | 12.8 |
| 14. | Indian Hills Census Designated Place | Jefferson | 13.0 |
| 15. | Bonanza Mountain Estates Census Designated Place | Boulder | 13.1 |
| 16. | Saint Ann Highlands Census Designated Place | Boulder | 13.3 |
| 17. | Westcreek Census Designated Place | Douglas | 13.5 |
| 18. | Idledale Census Designated Place | Jefferson | 14.1 |
| 19. | Aspen Park Census Designated Place | Jefferson | 14.2 |
| 20. | Town of Morrison | Jefferson | 14.3 |
