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. | Ellis County | 29.8 |
| 2. | Grant County | 30.1 |
| 3. | Roger Mills County | 34.1 |
| 4. | Alfalfa County | 34.7 |
| 5. | Lincoln County | 35.4 |
| 6. | Dewey County | 37.7 |
| 7. | Grady County | 38.5 |
| 8. | Woods County | 38.6 |
| 9. | Major County | 39.2 |
| 10. | Noble County | 39.3 |
| 11. | Washita County | 40.6 |
| 12. | McClain County | 42.5 |
| 13. | Stephens County | 42.9 |
| 14. | Pawnee County | 42.9 |
| 15. | Payne County | 43.1 |
| 16. | Logan County | 44.2 |
| 17. | Creek County | 45.4 |
| 18. | Cotton County | 47.5 |
| 19. | Woodward County | 47.7 |
| 20. | Jefferson County | 48.5 |
