18 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Arlington | Middlesex County | 48,102 |
| Attleboro | Bristol County | 47,523 |
| Andover | Essex County | 37,365 |
| Agawam Town | Hampden County | 29,339 |
| Acton | Middlesex County | 25,053 |
| Ashland | Middlesex County | 20,589 |
| Auburn | Worcester County | 18,083 |
| Abington | Plymouth County | 17,206 |
| Athol | Worcester County | 12,279 |
| Acushnet | Bristol County | 10,804 |
| Ayer | Middlesex County | 9,396 |
| Adams | Berkshire County | 7,944 |
| Ashburnham | Worcester County | 6,654 |
| Avon | Norfolk County | 4,879 |
| Ashby | Middlesex County | 3,352 |
| Ashfield | Franklin County | 1,677 |
| Alford | Berkshire County | 481 |
| Aquinnah | Dukes County | 461 |