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. | Clay County | 15.5 |
| 2. | Stone County | 18.2 |
| 3. | Newton County | 18.6 |
| 4. | Fulton County | 19.1 |
| 5. | Lawrence County | 19.4 |
| 6. | Marion County | 19.5 |
| 7. | Cleburne County | 20.1 |
| 8. | Baxter County | 20.5 |
| 9. | Sharp County | 20.8 |
| 10. | Searcy County | 21.3 |
| 11. | Van Buren County | 22.1 |
| 12. | Boone County | 23.0 |
| 13. | Perry County | 23.4 |
| 14. | Izard County | 23.9 |
| 15. | Grant County | 24.1 |
| 16. | Randolph County | 25.5 |
| 17. | Franklin County | 26.9 |
| 18. | Greene County | 27.6 |
| 19. | Logan County | 27.6 |
| 20. | Montgomery County | 28.9 |