7 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Kearny | Hudson County | 41,496 |
| Kinnelon | Morris County | 10,137 |
| Keansburg | Monmouth County | 9,691 |
| Kenilworth | Union County | 8,660 |
| Keyport | Monmouth County | 7,237 |
| Kingwood | Hunterdon County | 3,866 |
| Knowlton | Warren County | 2,948 |