New Jersey counties ranked by the diversity index, the chance that two public school students picked at random from the county belong to different racial or ethnic groups. Counties need at least 3 schools and 1,000 students to qualify. The median ranked county is at 62.1%.
| # | County | State | Diversity index |
|---|---|---|---|
| 1 | Somerset County | NJ | 73.8% |
| 2 | Mercer County | NJ | 73.3% |
| 3 | Middlesex County | NJ | 72.9% |
| 4 | Camden County | NJ | 72.0% |
| 5 | Atlantic County | NJ | 71.5% |
| 6 | Essex County | NJ | 70.2% |
| 7 | Bergen County | NJ | 68.6% |
| 8 | Burlington County | NJ | 66.9% |
| 9 | Union County | NJ | 66.3% |
| 10 | Cumberland County | NJ | 63.0% |
| 11 | Salem County | NJ | 62.1% |
| 12 | Morris County | NJ | 61.7% |
| 13 | Hudson County | NJ | 61.7% |
| 14 | Warren County | NJ | 57.9% |
| 15 | Gloucester County | NJ | 57.2% |
| 16 | Monmouth County | NJ | 57.1% |
| 17 | Passaic County | NJ | 56.0% |
| 18 | Ocean County | NJ | 54.3% |
| 19 | Cape May County | NJ | 47.5% |
| 20 | Hunterdon County | NJ | 45.2% |
| 21 | Sussex County | NJ | 44.5% |