7 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Kearny | Hudson County | 42,126 |
| Kinnelon | Morris County | 10,166 |
| Keansburg | Monmouth County | 9,693 |
| Kenilworth | Union County | 8,793 |
| Keyport | Monmouth County | 7,292 |
| Kingwood | Hunterdon County | 3,869 |
| Knowlton | Warren County | 2,957 |