Oklahoma Gazetteer
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. | Grant County | 29.2 |
| 2. | Dewey County | 35.3 |
| 3. | Ellis County | 38.8 |
| 4. | Alfalfa County | 39.6 |
| 5. | Roger Mills County | 39.7 |
| 6. | Woods County | 40.6 |
| 7. | Lincoln County | 42.1 |
| 8. | Noble County | 42.4 |
| 9. | Washita County | 43.2 |
| 10. | Major County | 44.1 |
| 11. | Grady County | 46.5 |
| 12. | Pawnee County | 46.6 |
| 13. | Stephens County | 48.7 |
| 14. | Jefferson County | 49.3 |
| 15. | Cotton County | 49.8 |
| 16. | Creek County | 51.4 |
| 17. | Payne County | 51.9 |
| 18. | Greer County | 52.4 |
| 19. | Beckham County | 52.5 |
| 20. | McClain County | 52.8 |
