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 Lamont | Grant | 18.5 |
| 2. | Chester Census Designated Place | Major | 22.8 |
| 3. | Town of Billings | Noble | 25.3 |
| 4. | Town of Nash | Grant | 25.3 |
| 5. | Town of Wakita | Grant | 25.4 |
| 6. | Town of Cimarron City | Logan | 25.7 |
| 7. | Town of Dacoma | Woods | 26.9 |
| 8. | Town of Taloga | Dewey | 26.9 |
| 9. | Town of Braman | Kay | 27.6 |
| 10. | Town of Hunter | Garfield | 27.9 |
| 11. | Town of Vici | Dewey | 28.6 |
| 12. | Town of Freedom | Woods | 29.0 |
| 13. | Crescent Springs Census Designated Place | Logan | 29.4 |
| 14. | Town of Arnett | Ellis | 29.6 |
| 15. | Town of Mulhall | Logan | 30.1 |
| 16. | Town of Kremlin | Garfield | 30.4 |
| 17. | Town of Carter | Beckham | 30.4 |
| 18. | Town of Reydon | Roger Mills | 31.3 |
| 19. | Town of Randlett | Cotton | 31.8 |
| 20. | Town of Leedey | Dewey | 31.9 |