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.
| County | Diversity Index | |
|---|---|---|
| 1. | Vernon County | 12.7 |
| 2. | Iron County | 14.6 |
| 3. | Price County | 14.9 |
| 4. | Florence County | 15.5 |
| 5. | Rusk County | 15.6 |
| 6. | Oneida County | 15.9 |
| 7. | Lincoln County | 16.0 |
| 8. | Crawford County | 16.2 |
| 9. | Iowa County | 16.3 |
| 10. | Buffalo County | 16.5 |
| 11. | Taylor County | 16.9 |
| 12. | Oconto County | 17.3 |
| 13. | Pepin County | 17.3 |
| 14. | Grant County | 17.4 |
| 15. | Polk County | 17.6 |
| 16. | Washburn County | 18.6 |
| 17. | Marinette County | 18.9 |
| 18. | Langlade County | 19.3 |
| 19. | Marquette County | 19.4 |
| 20. | Chippewa County | 19.5 |