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 Deer Park | Garrett | 2.0 |
| 2. | Town of Kitzmiller | Garrett | 3.0 |
| 3. | Bowmans Addition Census Designated Place | Allegany | 3.2 |
| 4. | Carlos Census Designated Place | Allegany | 3.7 |
| 5. | Shaft Census Designated Place | Allegany | 4.0 |
| 6. | Vale Summit Census Designated Place | Allegany | 4.1 |
| 7. | Midlothian Census Designated Place | Allegany | 4.7 |
| 8. | Pleasant Grove Census Designated Place | Allegany | 5.0 |
| 9. | Town of Lonaconing | Allegany | 5.0 |
| 10. | Town of Westernport | Allegany | 5.1 |
| 11. | Town of Loch Lynn Heights | Garrett | 6.0 |
| 12. | Town of Midland | Allegany | 6.1 |
| 13. | Town of Grantsville | Garrett | 6.2 |
| 14. | Town of Barton | Allegany | 6.3 |
| 15. | Moscow Census Designated Place | Allegany | 6.4 |
| 16. | Franklin Census Designated Place | Allegany | 6.5 |
| 17. | Danville Census Designated Place | Allegany | 6.8 |
| 18. | Rawlings Census Designated Place | Allegany | 6.8 |
| 19. | Town of Friendsville | Garrett | 6.9 |
| 20. | Bier Census Designated Place | Allegany | 7.0 |
