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 Parker | La Paz | 91.1 |
| 2. | Stanfield Census Designated Place | Pinal | 91.0 |
| 3. | Theba Census Designated Place | Maricopa | 90.4 |
| 4. | City of Eloy | Pinal | 89.6 |
| 5. | Poston Census Designated Place | La Paz | 88.1 |
| 6. | City of South Tucson | Pima | 85.9 |
| 7. | City of Avondale | Maricopa | 85.1 |
| 8. | Town of Gila Bend | Maricopa | 84.7 |
| 9. | Town of Guadalupe | Maricopa | 84.1 |
| 10. | City of El Mirage | Maricopa | 83.7 |
| 11. | Arlington Census Designated Place | Maricopa | 83.7 |
| 12. | Nelson Census Designated Place | Pima | 83.7 |
| 13. | City of Tolleson | Maricopa | 83.7 |
| 14. | Tusayan Census Designated Place (historical) | Coconino | 82.4 |
| 15. | City of Winslow | Navajo | 81.6 |
| 16. | City of Coolidge | Pinal | 81.1 |
| 17. | Sun Valley Census Designated Place | Navajo | 80.5 |
| 18. | Valencia West Census Designated Place | Pima | 80.3 |
| 19. | Drexel Heights Census Designated Place | Pima | 80.3 |
| 20. | City of Phoenix | Maricopa | 80.1 |
