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.
| Borough | Diversity Index | |
|---|---|---|
| 1. | Aleutians West Census Area | 80.8 |
| 2. | Aleutians East Borough | 80.3 |
| 3. | Yakutat City and Borough | 72.4 |
| 4. | Kodiak Island Borough | 71.8 |
| 5. | Anchorage Municipality | 67.5 |
| 6. | Bristol Bay Borough | 67.5 |
| 7. | North Slope Borough | 65.5 |
| 8. | Hoonah-Angoon Census Area | 64.2 |
| 9. | Sitka City and Borough | 62.0 |
| 10. | Prince of Wales-Hyder Census Area | 61.9 |
| 11. | Ketchikan Gateway Borough | 59.3 |
| 12. | Juneau City and Borough | 59.0 |
| 13. | Petersburg Census Area | 59.0 |
| 14. | Lake and Peninsula Borough | 56.9 |
| 15. | Fairbanks North Star Borough | 53.9 |
| 16. | Wrangell City and Borough | 52.4 |
| 17. | Valdez-Cordova Census Area | 52.2 |
| 18. | Dillingham Census Area | 49.0 |
| 19. | Southeast Fairbanks Census Area | 48.8 |
| 20. | Yukon-Koyukuk Census Area | 48.4 |
