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. | Town of Corona | Roberts | 1.7 |
| 2. | Town of Cresbard | Faulk | 2.0 |
| 3. | City of Emery | Hanson | 2.6 |
| 4. | City of Bryant | Hamlin | 3.0 |
| 5. | Town of Stickney | Aurora | 3.5 |
| 6. | City of Wessington Springs | Jerauld | 4.4 |
| 7. | City of Conde | Spink | 4.4 |
| 8. | City of Platte | Charles Mix | 4.7 |
| 9. | Village of Wentworth | Lake | 5.0 |
| 10. | Lake Madison Census Designated Place | Lake | 5.0 |
| 11. | City of Viborg | Turner | 5.4 |
| 12. | Town of Frederick | Brown | 5.5 |
| 13. | City of White | Brookings | 5.6 |
| 14. | City of Woonsocket | Sanborn | 5.9 |
| 15. | City of Oldham | Kingsbury | 6.1 |
| 16. | Chester Census Designated Place | Lake | 6.1 |
| 17. | Town of Langford | Marshall | 6.2 |
| 18. | Town of Ethan | Davison | 6.4 |
| 19. | City of Corsica | Douglas | 6.4 |
| 20. | Town of Pollock | Campbell | 6.4 |
