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. | El Cenizo Census Designated Place | Starr | 0.7 |
| 2. | Los Ebanos Census Designated Place | Starr | 0.7 |
| 3. | Palo Blanco Census Designated Place | Starr | 1.6 |
| 4. | Rancho Viejo Census Designated Place | Starr | 1.6 |
| 5. | El Quiote Census Designated Place | Starr | 2.4 |
| 6. | Abram Census Designated Place | Hidalgo | 2.9 |
| 7. | Los Barreras Census Designated Place | Starr | 2.9 |
| 8. | Loma Vista Census Designated Place | Starr | 3.1 |
| 9. | Los Ebanos Census Designated Place | Hidalgo | 3.2 |
| 10. | Mesquite Census Designated Place | Starr | 4.6 |
| 11. | West Sharyland Census Designated Place | Hidalgo | 4.6 |
| 12. | City of Sullivan City | Hidalgo | 4.7 |
| 13. | Havana Census Designated Place | Hidalgo | 4.8 |
| 14. | Eidson Road Census Designated Place | Maverick | 5.1 |
| 15. | City of Palmview | Hidalgo | 5.2 |
| 16. | La Paloma Ranchettes Census Designated Place | Starr | 5.2 |
| 17. | Mikes Census Designated Place | Starr | 5.3 |
| 18. | East Alto Bonito Census Designated Place | Starr | 6.1 |
| 19. | Camargito Census Designated Place | Starr | 6.2 |
| 20. | B and E Census Designated Place | Starr | 6.4 |
