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. | Borough of Carteret | Middlesex | 89.3 |
| 2. | City of Hackensack | Bergen | 89.1 |
| 3. | Silver Lake Census Designated Place | Essex | 88.9 |
| 4. | Ampere North Census Designated Place | Essex | 88.4 |
| 5. | Borough of North Plainfield | Somerset | 88.1 |
| 6. | Town of Harrison | Hudson | 88.0 |
| 7. | Borough of Bogota | Bergen | 87.9 |
| 8. | East Franklin Census Designated Place | Somerset | 87.8 |
| 9. | Borough of Haledon | Passaic | 87.8 |
| 10. | Borough of Woodlynne | Camden | 87.7 |
| 11. | Village of Ridgefield Park | Bergen | 87.6 |
| 12. | Twin Rivers Census Designated Place | Mercer | 87.6 |
| 13. | City of Englewood | Bergen | 87.5 |
| 14. | City of New Brunswick | Middlesex | 87.0 |
| 15. | City of Atlantic City | Atlantic | 86.9 |
| 16. | Borough of Prospect Park | Passaic | 86.9 |
| 17. | Borough of Bergenfield | Bergen | 86.7 |
| 18. | Watsessing Census Designated Place | Essex | 86.7 |
| 19. | City of Pleasantville | Atlantic | 86.5 |
| 20. | Borough of Bound Brook | Somerset | 86.5 |