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 Oconee | Shelby | 1.4 |
| 2. | Village of Venedy | Washington | 1.6 |
| 3. | Village of Oakford | Menard | 2.6 |
| 4. | Village of Media | Henderson | 3.4 |
| 5. | Village of Kell | Marion | 3.6 |
| 6. | Village of Hooppole | Henry | 4.0 |
| 7. | Village of Bone Gap | Edwards | 4.0 |
| 8. | Village of Vermilion | Edgar | 4.1 |
| 9. | Village of Ellis Grove | Randolph | 4.3 |
| 10. | Village of Strasburg | Shelby | 4.4 |
| 11. | Village of Modesto | Macoupin | 4.6 |
| 12. | Village of Browns | Edwards | 4.8 |
| 13. | Elwin Census Designated Place | Macon | 5.0 |
| 14. | Village of Calhoun | Richland | 5.2 |
| 15. | Prairietown Census Designated Place | Madison | 5.3 |
| 16. | Village of Willow Hill | Jasper | 5.3 |
| 17. | Village of Kane | Greene | 5.5 |
| 18. | West Union Census Designated Place | Clark | 5.5 |
| 19. | Village of Nebo | Pike | 5.5 |
| 20. | Village of Gays | Moultrie | 5.6 |