18 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Arlington | Middlesex County | 47,607 |
| Attleboro | Bristol County | 47,304 |
| Andover | Essex County | 37,146 |
| Agawam Town | Hampden County | 29,044 |
| Acton | Middlesex County | 24,796 |
| Ashland | Middlesex County | 19,990 |
| Auburn | Worcester County | 17,703 |
| Abington | Plymouth County | 17,148 |
| Athol | Worcester County | 12,192 |
| Acushnet | Bristol County | 10,752 |
| Ayer | Middlesex County | 9,203 |
| Adams | Berkshire County | 7,968 |
| Ashburnham | Worcester County | 6,588 |
| Avon | Norfolk County | 4,840 |
| Ashby | Middlesex County | 3,311 |
| Ashfield | Franklin County | 1,681 |
| Alford | Berkshire County | 482 |
| Aquinnah | Dukes County | 456 |