Identifiers: city · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Worcester (city), MA | 206,518 |
| 2 | Lowell (city), MA | 115,554 |
| 3 | Leominster (city), MA | 43,782 |
| 4 | Marlborough (city), MA | 41,793 |
| 5 | Hudson (CDP), MA | 15,749 |
| 6 | Maynard (CDP), MA | 10,746 |
| 7 | Clinton (CDP), MA | 8,166 |
| 8 | West Concord (CDP), MA | 6,320 |
| 9 | Littleton Common (CDP), MA | 3,065 |
| 10 | Ayer (CDP), MA | 2,986 |
| 11 | Pepperell (CDP), MA | 2,390 |
| 12 | East Pepperell (CDP), MA | 2,120 |
| 13 | South Lancaster (CDP), MA | 1,838 |
| 14 | Lunenburg (CDP), MA | 1,789 |
| 15 | Devens (CDP), MA | 1,697 |
| 16 | Shirley (CDP), MA | 1,611 |
| 17 | Groton (CDP), MA | 1,353 |
| 18 | Townsend (CDP), MA | 1,213 |