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