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. | Jackson County | 4.8 |
| 2. | Lewis County | 4.9 |
| 3. | Wolfe County | 5.8 |
| 4. | Magoffin County | 6.0 |
| 5. | Lee County | 6.0 |
| 6. | Leslie County | 6.0 |
| 7. | Letcher County | 6.1 |
| 8. | Robertson County | 6.8 |
| 9. | Rockcastle County | 7.0 |
| 10. | Floyd County | 7.0 |
| 11. | Johnson County | 7.1 |
| 12. | Owsley County | 7.3 |
| 13. | Pike County | 7.3 |
| 14. | Estill County | 7.5 |
| 15. | Knott County | 7.7 |
| 16. | Lawrence County | 7.8 |
| 17. | Crittenden County | 8.1 |
| 18. | Carter County | 8.2 |
| 19. | Pendleton County | 8.3 |
| 20. | McLean County | 8.8 |
