| City | County | 2026 Pop. ↓ |
|---|---|---|
| Revere | Suffolk County | 59,907 |
| Randolph Town | Norfolk County | 35,036 |
| Reading | Middlesex County | 25,792 |
| Rockland | Plymouth County | 17,941 |
| Raynham | Bristol County | 17,035 |
| Rehoboth | Bristol County | 13,676 |
| Rutland | Worcester County | 9,902 |
| Rockport | Essex County | 7,153 |
| Rowley | Essex County | 6,364 |
| Rochester | Plymouth County | 5,950 |
| Russell | Hampden County | 1,640 |
| Richmond | Berkshire County | 1,394 |
| Royalston | Worcester County | 1,299 |
| Rowe | Franklin County | 415 |