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.
| County | Diversity Index | |
|---|---|---|
| 1. | Manassas Park city | 87.2 |
| 2. | Manassas city | 82.8 |
| 3. | Prince William County | 80.2 |
| 4. | Fairfax County | 72.7 |
| 5. | Alexandria city | 71.6 |
| 6. | Fairfax city | 69.9 |
| 7. | Loudoun County | 68.9 |
| 8. | Newport News city | 68.5 |
| 9. | Norfolk city | 67.1 |
| 10. | Hopewell city | 66.6 |
| 11. | Harrisonburg city | 66.0 |
| 12. | Winchester city | 65.2 |
| 13. | Fredericksburg city | 65.1 |
| 14. | Stafford County | 65.1 |
| 15. | Henrico County | 65.1 |
| 16. | Richmond city | 64.9 |
| 17. | Arlington County | 64.8 |
| 18. | Prince George County | 63.7 |
| 19. | Hampton city | 63.7 |
| 20. | Martinsville city | 63.3 |
