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. | Village of Glenwood | Schuyler | 2.3 |
| 2. | Town of Middletown | Montgomery | 3.7 |
| 3. | Village of Turney | Clinton | 4.7 |
| 4. | City of Frohna | Perry | 4.9 |
| 5. | City of Coffey | Daviess | 5.6 |
| 6. | City of Syracuse | Morgan | 5.8 |
| 7. | City of Bogard | Carroll | 6.2 |
| 8. | Climax Springs Census Designated Place | Camden | 6.4 |
| 9. | Village of Holliday | Monroe | 6.4 |
| 10. | City of Amoret | Bates | 6.8 |
| 11. | Village of Freeburg | Osage | 7.3 |
| 12. | City of Mendon | Chariton | 7.5 |
| 13. | Town of Sheridan | Worth | 7.6 |
| 14. | City of Laredo | Grundy | 7.8 |
| 15. | City of Altenburg | Perry | 7.9 |
| 16. | Village of Dadeville | Dade | 7.9 |
| 17. | Village of Theodosia | Ozark | 8.1 |
| 18. | City of Irondale | Washington | 8.1 |
| 19. | City of Fillmore | Andrew | 8.1 |
| 20. | City of Pattonsburg | Daviess | 8.3 |