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. | Kelly Census Designated Place | Teton | 6.6 |
| 2. | Town of Pine Haven | Crook | 7.6 |
| 3. | Town of Sundance | Crook | 9.0 |
| 4. | Big Horn Census Designated Place | Sheridan | 9.4 |
| 5. | Wilson Census Designated Place | Teton | 9.4 |
| 6. | Fort Bridger Census Designated Place | Uinta | 9.6 |
| 7. | Brookhurst Census Designated Place | Natrona | 9.9 |
| 8. | Town of Hulett | Crook | 10.2 |
| 9. | Meadow Acres Census Designated Place | Natrona | 10.4 |
| 10. | Smoot Census Designated Place | Lincoln | 10.4 |
| 11. | Story Census Designated Place | Sheridan | 10.9 |
| 12. | Casper Mountain Census Designated Place | Natrona | 11.2 |
| 13. | Fairview Census Designated Place | Lincoln | 11.2 |
| 14. | Grover Census Designated Place | Lincoln | 11.6 |
| 15. | Town of Meeteetse | Park | 11.8 |
| 16. | Town of Clearmont | Sheridan | 11.9 |
| 17. | Auburn Census Designated Place | Lincoln | 11.9 |
| 18. | Vista West Census Designated Place | Natrona | 12.3 |
| 19. | Urie Census Designated Place | Uinta | 13.1 |
| 20. | Town of Mountain View | Uinta | 13.1 |
