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. | Minot Air Force Base Census Designated Place | Ward | 67.7 |
| 2. | City of Parshall | Mountrail | 64.8 |
| 3. | Grand Forks Air Force Base Census Designated Place | Grand Forks | 61.8 |
| 4. | City of New Town | Mountrail | 61.5 |
| 5. | Four Bears Village Census Designated Place | McKenzie | 59.8 |
| 6. | Mandaree Census Designated Place | McKenzie | 59.7 |
| 7. | City of Selfridge | Sioux | 58.3 |
| 8. | City of Rolla | Rolette | 57.8 |
| 9. | White Shield Census Designated Place | McLean | 56.8 |
| 10. | City of Minnewaukan | Benson | 54.4 |
| 11. | City of Rolette | Rolette | 53.5 |
| 12. | City of Grafton | Walsh | 48.1 |
| 13. | City of Saint John | Rolette | 45.0 |
| 14. | City of Killdeer | Dunn | 43.0 |
| 15. | City of Saint Thomas | Pembina | 40.1 |
| 16. | City of Williston | Williams | 39.7 |
| 17. | City of Devils Lake | Ramsey | 38.6 |
| 18. | City of Alexander | McKenzie | 37.5 |
| 19. | Cannon Ball Census Designated Place | Sioux | 35.6 |
| 20. | City of Watford City | McKenzie | 35.3 |
