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. | Osage County | 6.0 |
| 2. | Scotland County | 6.1 |
| 3. | Schuyler County | 6.2 |
| 4. | Atchison County | 7.0 |
| 5. | Worth County | 7.3 |
| 6. | Clark County | 7.5 |
| 7. | Knox County | 7.5 |
| 8. | Holt County | 7.6 |
| 9. | Mercer County | 8.3 |
| 10. | Ste. Genevieve County | 8.3 |
| 11. | Putnam County | 8.7 |
| 12. | Gasconade County | 8.7 |
| 13. | Gentry County | 8.7 |
| 14. | Daviess County | 9.3 |
| 15. | Bollinger County | 9.3 |
| 16. | Maries County | 9.9 |
| 17. | Ralls County | 10.2 |
| 18. | Chariton County | 10.5 |
| 19. | Carroll County | 11.0 |
| 20. | Stoddard County | 11.0 |
