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. | Kusilvak Census Area | 11.5 |
| 2. | Denali Borough | 29.3 |
| 3. | Skagway Municipality | 29.4 |
| 4. | Bethel Census Area | 31.2 |
| 5. | Northwest Arctic Borough | 36.5 |
| 6. | Kenai Peninsula Borough | 37.3 |
| 7. | Matanuska-Susitna Borough | 40.1 |
| 8. | Haines Borough | 40.4 |
| 9. | Nome Census Area | 43.3 |
| 10. | Yukon-Koyukuk Census Area | 48.4 |
| 11. | Southeast Fairbanks Census Area | 48.8 |
| 12. | Dillingham Census Area | 49.0 |
| 13. | Valdez-Cordova Census Area | 52.2 |
| 14. | Wrangell City and Borough | 52.4 |
| 15. | Fairbanks North Star Borough | 53.9 |
| 16. | Lake and Peninsula Borough | 56.9 |
| 17. | Juneau City and Borough | 59.0 |
| 18. | Petersburg Census Area | 59.0 |
| 19. | Ketchikan Gateway Borough | 59.3 |
| 20. | Prince of Wales-Hyder Census Area | 61.9 |
