| City | County | 2026 Pop. ↓ |
|---|---|---|
| Rahway | Union County | 31,007 |
| Rockaway | Morris County | 28,611 |
| Randolph | Morris County | 27,065 |
| Ridgewood village | Bergen County | 26,501 |
| Raritan | Somerset County | 25,406 |
| Roxbury | Morris County | 23,509 |
| Roselle | Union County | 23,276 |
| Rutherford | Bergen County | 19,154 |
| Roselle Park | Union County | 16,709 |
| Readington | Hunterdon County | 16,526 |
| Robbinsville | Mercer County | 15,986 |
| Ramsey | Bergen County | 14,924 |
| Ridgefield Park village | Bergen County | 13,372 |
| Red Bank | Monmouth County | 12,944 |
| River Edge | Bergen County | 12,147 |
| Ringwood | Passaic County | 11,854 |
| Ridgefield | Bergen County | 11,497 |
| River Vale | Bergen County | 10,759 |
| Raritan | Somerset County | 8,504 |
| Runnemede | Camden County | 8,470 |
| Riverside | Burlington County | 8,281 |
| Rumson | Monmouth County | 7,117 |
| Rockaway | Morris County | 6,646 |
| Roseland | Essex County | 6,421 |
| Rochelle Park | Bergen County | 5,972 |
| Riverdale | Morris County | 4,154 |
| Riverton | Burlington County | 2,860 |
| Roosevelt | Monmouth County | 808 |
| Rocky Hill | Somerset County | 752 |
| Rockleigh | Bergen County | 397 |