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. | Town of Broaddus | San Augustine | 10.5 |
| 2. | City of Novice | Coleman | 15.0 |
| 3. | Myra Census Designated Place | Cooke | 17.5 |
| 4. | City of Zavalla | Angelina | 18.9 |
| 5. | Town of Bloomburg | Cass | 19.4 |
| 6. | Evadale Census Designated Place | Jasper | 19.6 |
| 7. | City of Lindsay | Cooke | 19.7 |
| 8. | Wildwood Census Designated Place | Hardin | 20.3 |
| 9. | Warren Census Designated Place | Tyler | 20.9 |
| 10. | Emerald Bay Census Designated Place | Smith | 21.9 |
| 11. | Deweyville Census Designated Place | Newton | 22.2 |
| 12. | Sam Rayburn Census Designated Place | Jasper | 22.3 |
| 13. | Town of Chester | Tyler | 23.7 |
| 14. | Town of Dodd City | Fannin | 24.2 |
| 15. | City of Bellevue | Clay | 24.6 |
| 16. | Preston Census Designated Place | Grayson | 25.0 |
| 17. | Lake Kiowa Census Designated Place | Cooke | 25.1 |
| 18. | Town of Windom | Fannin | 25.9 |
| 19. | Zephyr Census Designated Place | Brown | 26.1 |
| 20. | Pecan Plantation Census Designated Place | Hood | 26.4 |