30 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Rahway | Union County | 31,224 |
| Rockaway | Morris County | 27,247 |
| Ridgewood village | Bergen County | 26,975 |
| Randolph | Morris County | 26,856 |
| Raritan | Somerset County | 25,848 |
| Roxbury | Morris County | 23,437 |
| Roselle | Union County | 23,420 |
| Rutherford | Bergen County | 19,404 |
| Readington | Hunterdon County | 16,425 |
| Robbinsville | Mercer County | 16,280 |
| Ramsey | Bergen County | 15,167 |
| Roselle Park | Union County | 14,617 |
| Ridgefield Park village | Bergen County | 13,540 |
| Red Bank | Monmouth County | 12,839 |
| River Edge | Bergen County | 12,365 |
| Ringwood | Passaic County | 11,912 |
| Ridgefield | Bergen County | 11,815 |
| River Vale | Bergen County | 10,607 |
| Raritan | Somerset County | 8,668 |
| Runnemede | Camden County | 8,470 |
| Riverside | Burlington County | 8,215 |
| Rumson | Monmouth County | 7,185 |
| Rockaway | Morris County | 6,663 |
| Roseland | Essex County | 6,467 |
| Rochelle Park | Bergen County | 6,124 |
| Riverdale | Morris County | 4,151 |
| Riverton | Burlington County | 2,845 |
| Roosevelt | Monmouth County | 805 |
| Rocky Hill | Somerset County | 764 |
| Rockleigh | Bergen County | 408 |