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. | Four Bears Village Census Designated Place | McKenzie | 78.6 |
| 2. | Mandaree Census Designated Place | McKenzie | 78.6 |
| 3. | Minot Air Force Base Census Designated Place | Ward | 74.5 |
| 4. | Grand Forks Air Force Base Census Designated Place | Grand Forks | 67.5 |
| 5. | City of Parshall | Mountrail | 60.8 |
| 6. | City of Rolla | Rolette | 60.2 |
| 7. | City of Selfridge | Sioux | 58.1 |
| 8. | City of Rolette | Rolette | 56.9 |
| 9. | White Shield Census Designated Place | McLean | 56.9 |
| 10. | City of Minnewaukan | Benson | 56.1 |
| 11. | City of New Town | Mountrail | 54.7 |
| 12. | City of Grafton | Walsh | 50.9 |
| 13. | City of Saint John | Rolette | 47.7 |
| 14. | City of Minto | Walsh | 40.9 |
| 15. | City of Devils Lake | Ramsey | 38.5 |
| 16. | City of Saint Thomas | Pembina | 38.1 |
| 17. | City of Killdeer | Dunn | 37.7 |
| 18. | City of Minot | Ward | 36.5 |
| 19. | City of Tappen | Kidder | 36.1 |
| 20. | Shell Valley Census Designated Place | Rolette | 35.0 |
