| Rank | County | Percentage of Black or African American Residents |
|---|---|---|
| 1 | Essex County, New Jersey | 42.1% |
| 2 | Union County, New Jersey | 23.3% |
| 3 | Cumberland County, New Jersey | 21.8% |
| 4 | Camden County, New Jersey | 21.0% |
| 5 | Mercer County, New Jersey | 21.0% |
| 6 | Atlantic County, New Jersey | 17.3% |
| 7 | Burlington County, New Jersey | 17.3% |
| 8 | Hudson County, New Jersey | 15.0% |
| 9 | Salem County, New Jersey | 14.7% |
| 10 | Passaic County, New Jersey | 14.7% |
| 11 | Middlesex County, New Jersey | 10.9% |
| 12 | Gloucester County, New Jersey | 10.5% |
| 13 | Somerset County, New Jersey | 9.6% |
| 14 | Monmouth County, New Jersey | 7.7% |
| 15 | Bergen County, New Jersey | 6.7% |
| 16 | Cape May County, New Jersey | 5.0% |
| 17 | Warren County, New Jersey | 4.1% |
| 18 | Ocean County, New Jersey | 3.4% |
| 19 | Morris County, New Jersey | 3.4% |
| 20 | Hunterdon County, New Jersey | 2.9% |
| 21 | Sussex County, New Jersey | 2.0% |
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