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. | New Cassel Census Designated Place | Nassau | 89.7 |
| 2. | City of Newburgh | Orange | 88.9 |
| 3. | North Bay Shore Census Designated Place | Suffolk | 88.4 |
| 4. | Central Islip Census Designated Place | Suffolk | 88.4 |
| 5. | Village of Elmsford | Westchester | 88.2 |
| 6. | Inwood Census Designated Place | Nassau | 88.1 |
| 7. | Village of Freeport | Nassau | 87.5 |
| 8. | Village of Haverstraw | Rockland | 86.9 |
| 9. | City of Middletown | Orange | 86.5 |
| 10. | Village of Ossining | Westchester | 86.1 |
| 11. | Village of Hempstead | Nassau | 86.1 |
| 12. | City of Peekskill | Westchester | 86.0 |
| 13. | Brentwood Census Designated Place | Suffolk | 85.8 |
| 14. | Village of Spring Valley | Rockland | 85.0 |
| 15. | City of New York | New York | 84.9 |
| 16. | Uniondale Census Designated Place | Nassau | 84.6 |
| 17. | City of Yonkers | Westchester | 84.2 |
| 18. | Village of West Haverstraw | Rockland | 84.0 |
| 19. | Village of Sleepy Hollow | Westchester | 83.4 |
| 20. | Village of Westbury | Nassau | 83.3 |
