Identifiers: city · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Barnstable Town (city), MA | 48,916 |
| 2 | East Falmouth (CDP), MA | 6,278 |
| 3 | Buzzards Bay (CDP), MA | 4,279 |
| 4 | Forestdale (CDP), MA | 4,116 |
| 5 | Sagamore (CDP), MA | 3,851 |
| 6 | Falmouth (CDP), MA | 3,818 |
| 7 | North Falmouth (CDP), MA | 3,293 |
| 8 | Sandwich (CDP), MA | 2,998 |
| 9 | Pocasset (CDP), MA | 2,843 |
| 10 | Monument Beach (CDP), MA | 2,784 |
| 11 | West Falmouth (CDP), MA | 1,812 |
| 12 | Teaticket (CDP), MA | 1,663 |
| 13 | Onset (CDP), MA | 1,617 |
| 14 | Bourne (CDP), MA | 1,497 |
| 15 | Mashpee Neck (CDP), MA | 1,076 |
| 16 | New Seabury (CDP), MA | 852 |
| 17 | Woods Hole (CDP), MA | 834 |
| 18 | Seabrook (CDP), MA | 448 |
| 19 | Popponesset (CDP), MA | 280 |
| 20 | Monomoscoy Island (CDP), MA | 139 |