30 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Rahway | Union County | 30,099 |
| Rockaway | Morris County | 26,740 |
| Randolph | Morris County | 26,709 |
| Ridgewood village | Bergen County | 26,284 |
| Raritan | Somerset County | 25,229 |
| Roxbury | Morris County | 23,393 |
| Roselle | Union County | 22,410 |
| Rutherford | Bergen County | 19,238 |
| Readington | Hunterdon County | 16,295 |
| Robbinsville | Mercer County | 15,431 |
| Ramsey | Bergen County | 14,784 |
| Roselle Park | Union County | 13,894 |
| Ridgefield Park village | Bergen County | 13,191 |
| Red Bank | Monmouth County | 12,651 |
| River Edge | Bergen County | 12,019 |
| Ridgefield | Bergen County | 11,461 |
| Ringwood | Passaic County | 11,399 |
| River Vale | Bergen County | 10,543 |
| Runnemede | Camden County | 8,406 |
| Raritan | Somerset County | 8,362 |
| Riverside | Burlington County | 8,110 |
| Rumson | Monmouth County | 7,128 |
| Rockaway | Morris County | 6,622 |
| Roseland | Essex County | 6,150 |
| Rochelle Park | Bergen County | 5,867 |
| Riverdale | Morris County | 4,117 |
| Riverton | Burlington County | 2,799 |
| Roosevelt | Monmouth County | 783 |
| Rocky Hill | Somerset County | 736 |
| Rockleigh | Bergen County | 415 |