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. | City of Veblen | Marshall | 90.8 |
| 2. | City of Martin | Bennett | 66.0 |
| 3. | City of Elkton | Brookings | 63.3 |
| 4. | City of Lake Andes | Charles Mix | 62.9 |
| 5. | City of Wagner | Charles Mix | 62.0 |
| 6. | City of White River | Mellette | 60.1 |
| 7. | City of Egan | Moody | 59.9 |
| 8. | City of Flandreau | Moody | 58.3 |
| 9. | Town of Isabel | Dewey | 57.1 |
| 10. | City of Timber Lake | Dewey | 57.1 |
| 11. | Okreek Census Designated Place | Todd | 56.6 |
| 12. | City of Sisseton | Roberts | 56.4 |
| 13. | City of Dupree | Ziebach | 56.4 |
| 14. | City of Huron | Beadle | 55.0 |
| 15. | Town of Peever | Roberts | 54.5 |
| 16. | Town of Summit | Roberts | 54.3 |
| 17. | Marty Census Designated Place | Charles Mix | 53.6 |
| 18. | Town of Pickstown | Charles Mix | 53.4 |
| 19. | City of Box Elder | Pennington | 53.4 |
| 20. | Long Hollow Census Designated Place | Roberts | 52.8 |
