| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Jackson | city | New Jersey | United States | 39.77639 | -74.86278 | 137 | 23422 |
| Jacksonburg | city | New Jersey | United States | 40.99167 | -74.98083 | 400 | 4551 |
| Jacksons Mills | city | New Jersey | United States | 40.14778 | -74.32444 | 98 | 26116 |
| Jacksonville | city | New Jersey | United States | 40.05028 | -74.76389 | 55 | 23053 |
| Jacksonville | city | New Jersey | United States | 40.9525 | -74.33028 | 239 | 62182 |
| Jacobstown | city | New Jersey | United States | 40.07583 | -74.58361 | 167 | 20868 |
| Jamesburg | city | New Jersey | United States | 40.3525 | -74.44056 | 62 | 39620 |
| Jamesburg Gardens | city | New Jersey | United States | 40.34306 | -74.42083 | 98 | 39620 |
| Jamesburg Park | city | New Jersey | United States | 40.37972 | -74.43917 | 98 | 68726 |
| Janvier | city | New Jersey | United States | 39.62694 | -75.01778 | 114 | 25953 |
| Jeffers Landing | city | New Jersey | United States | 39.31806 | -74.65222 | 3 | 22119 |
| Jefferson | city | New Jersey | United States | 39.75361 | -75.21222 | 98 | 22237 |
| Jenkins | city | New Jersey | United States | 39.69806 | -74.52694 | 39 | 577 |
| Jericho | city | New Jersey | United States | 39.47 | -75.35194 | 82 | 3534 |
| Jericho | city | New Jersey | United States | 39.80556 | -75.14028 | 98 | 79558 |
| Jersey City | city | New Jersey | United States | 40.72806 | -74.07806 | 85 | 440645 |
| Jerseyville | city | New Jersey | United States | 40.23917 | -74.22972 | 150 | 31647 |
| Jessups Mill | city | New Jersey | United States | 39.66167 | -75.23083 | 137 | 5607 |
| Jobstown | city | New Jersey | United States | 40.03694 | -74.69333 | 88 | 13553 |
| Johnson Place | city | New Jersey | United States | 39.86278 | -74.61833 | 101 | 4338 |
| Johnsonburg | city | New Jersey | United States | 40.96444 | -74.87889 | 597 | 4586 |
| Johnsontown | city | New Jersey | United States | 39.52361 | -74.46028 | 9 | 9964 |
| Jones Mill | city | New Jersey | United States | 39.32111 | -74.94139 | 16 | 3648 |
| Jones Mill | city | New Jersey | United States | 39.79639 | -74.52722 | 91 | 1211 |
| Jordantown | city | New Jersey | United States | 39.96417 | -75.03778 | 6 | 181778 |
| Juliustown | city | New Jersey | United States | 40.01333 | -74.66917 | 98 | 13553 |
| Jumbo | city | New Jersey | United States | 39.77306 | -75.39917 | 3 | 19976 |
| Jutland | city | New Jersey | United States | 40.62278 | -74.96472 | 390 | 9286 |
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