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.
| Name | County | Diversity Index | |
|---|---|---|---|
| 1. | Weingarten Census Designated Place | Ste. Genevieve | 2.9 |
| 2. | Village of Blythedale | Harrison | 3.0 |
| 3. | City of Frohna | Perry | 3.0 |
| 4. | Village of Caledonia | Washington | 3.2 |
| 5. | City of Altenburg | Perry | 3.2 |
| 6. | City of Gideon | New Madrid | 3.2 |
| 7. | City of Elmo | Nodaway | 3.4 |
| 8. | City of Clearmont | Nodaway | 3.4 |
| 9. | City of Skidmore | Nodaway | 3.4 |
| 10. | Town of Pickering | Nodaway | 3.5 |
| 11. | Village of Freeburg | Osage | 3.5 |
| 12. | Village of Gordonville | Cape Girardeau | 3.5 |
| 13. | City of Maitland | Holt | 3.5 |
| 14. | City of Blackwater | Cooper | 3.6 |
| 15. | City of Novinger | Adair | 3.6 |
| 16. | Leisure Lake Census Designated Place | Grundy | 3.7 |
| 17. | City of Meta | Osage | 3.7 |
| 18. | City of Laddonia | Audrain | 3.8 |
| 19. | Town of Argyle | Osage | 3.9 |
| 20. | City of Craig | Holt | 4.1 |
