19 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Attleboro | Bristol County | 46,820 |
| Arlington | Middlesex County | 46,805 |
| Andover | Essex County | 36,745 |
| Agawam Town | Hampden County | 28,472 |
| Acton | Middlesex County | 24,177 |
| Ashland | Middlesex County | 18,629 |
| Amesbury Town | Essex County | 17,549 |
| Abington | Plymouth County | 16,962 |
| Auburn | Worcester County | 16,858 |
| Athol | Worcester County | 11,965 |
| Acushnet | Bristol County | 10,654 |
| Ayer | Middlesex County | 8,618 |
| Adams | Berkshire County | 7,865 |
| Ashburnham | Worcester County | 6,475 |
| Avon | Norfolk County | 4,699 |
| Ashby | Middlesex County | 3,226 |
| Ashfield | Franklin County | 1,684 |
| Alford | Berkshire County | 477 |
| Aquinnah | Dukes County | 436 |