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 | 30.6 |
| 2. | Dewey County | 36.6 |
| 3. | Roger Mills County | 38.9 |
| 4. | Ellis County | 40.8 |
| 5. | Alfalfa County | 40.8 |
| 6. | Woods County | 41.6 |
| 7. | Washita County | 42.6 |
| 8. | Lincoln County | 42.7 |
| 9. | Noble County | 44.4 |
| 10. | Major County | 45.6 |
| 11. | Grady County | 46.7 |
| 12. | Pawnee County | 47.0 |
| 13. | Jefferson County | 49.5 |
| 14. | Stephens County | 49.8 |
| 15. | Cotton County | 50.8 |
| 16. | Creek County | 51.5 |
| 17. | Payne County | 51.6 |
| 18. | McClain County | 53.1 |
| 19. | Greer County | 53.4 |
| 20. | Logan County | 53.6 |
