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. | Tishomingo County | 22.0 |
| 2. | Itawamba County | 24.0 |
| 3. | Claiborne County | 24.3 |
| 4. | Jefferson County | 28.7 |
| 5. | Holmes County | 29.7 |
| 6. | George County | 29.9 |
| 7. | Prentiss County | 35.6 |
| 8. | Hancock County | 37.3 |
| 9. | Humphreys County | 37.4 |
| 10. | Webster County | 39.1 |
| 11. | Alcorn County | 39.5 |
| 12. | Tunica County | 39.6 |
| 13. | Perry County | 39.9 |
| 14. | Pearl River County | 40.7 |
| 15. | Quitman County | 41.0 |
| 16. | Smith County | 42.5 |
| 17. | Stone County | 43.0 |
| 18. | Union County | 43.0 |
| 19. | Coahoma County | 43.6 |
| 20. | Washington County | 43.7 |