Arizona counties ranked by the diversity index, the chance that two public school students picked at random from the county belong to different racial or ethnic groups. Counties need at least 3 schools and 1,000 students to qualify. The median ranked county is at 59.1%.
| # | County | State | Diversity index |
|---|---|---|---|
| 1 | Gila County | AZ | 68.7% |
| 2 | Coconino County | AZ | 67.6% |
| 3 | Pinal County | AZ | 65.8% |
| 4 | Maricopa County | AZ | 65.0% |
| 5 | La Paz County | AZ | 62.6% |
| 6 | Navajo County | AZ | 62.6% |
| 7 | Graham County | AZ | 60.3% |
| 8 | Pima County | AZ | 59.1% |
| 9 | Cochise County | AZ | 56.3% |
| 10 | Greenlee County | AZ | 54.8% |
| 11 | Mohave County | AZ | 54.1% |
| 12 | Yavapai County | AZ | 53.9% |
| 13 | Apache County | AZ | 36.8% |
| 14 | Yuma County | AZ | 23.0% |
| 15 | Santa Cruz County | AZ | 5.7% |