55 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Barnstable Town | 1 | 50,248 | 48,900 | 0.54% | 838 | 59.93 | City |
| Barnstable Town city | 2 | 50,151 | 48,900 | 0.44% | 837 | 59.93 | City |
| Falmouth town | 3 | 33,059 | 32,538 | -0.02% | 750 | 44.06 | Town |
| Yarmouth town | 4 | 24,855 | 24,992 | -0.5% | 1,029 | 24.16 | Town |
| Bourne town | 5 | 20,270 | 19,537 | -0.37% | 498 | 40.67 | Town |
| Sandwich town | 6 | 20,221 | 20,251 | -0.61% | 472 | 42.87 | Town |
| Mashpee town | 7 | 15,312 | 15,057 | -0.27% | 655 | 23.39 | Town |
| Dennis town | 8 | 14,871 | 14,676 | -0.11% | 722 | 20.60 | Town |
| Harwich town | 9 | 13,523 | 13,428 | -0.27% | 648 | 20.88 | Town |
| South Yarmouth | 10 | 11,983 | 10,598 | 0.49% | 1,723 | 6.96 | CDP |
| Brewster town | 11 | 10,283 | 10,315 | -0.47% | 448 | 22.94 | Town |
| East Falmouth | 12 | 6,688 | 6,163 | 0.65% | 1,230 | 5.44 | CDP |
| Chatham town | 13 | 6,649 | 6,594 | -0.27% | 411 | 16.17 | Town |
| Orleans town | 14 | 6,323 | 6,306 | -0.49% | 446 | 14.16 | Town |
| Yarmouth Port | 15 | 6,134 | 5,202 | 0.89% | 1,019 | 6.02 | CDP |
| West Yarmouth | 16 | 6,120 | 6,388 | 0.13% | 915 | 6.69 | CDP |
| East Harwich | 17 | 5,898 | 4,756 | 1.17% | 735 | 8.02 | CDP |
| Eastham town | 18 | 5,779 | 5,747 | -0.21% | 414 | 13.97 | Town |
| Northwest Harwich | 19 | 4,113 | 4,123 | 0.32% | 515 | 7.98 | CDP |
| Sagamore | 20 | 4,052 | 3,792 | 0.72% | 1,217 | 3.33 | CDP |
| East Dennis | 21 | 3,951 | 3,068 | 2.07% | 817 | 4.83 | CDP |
| Falmouth | 22 | 3,904 | 3,751 | 0.18% | 1,870 | 2.09 | CDP |
| Forestdale | 23 | 3,865 | 3,744 | -0.41% | 1,013 | 3.81 | CDP |
| East Sandwich | 24 | 3,749 | 3,628 | -0.35% | 499 | 7.52 | CDP |
| Provincetown town | 25 | 3,691 | 3,661 | -0.24% | 382 | 9.67 | Town |
| Provincetown | 26 | 3,631 | 2,730 | 1.85% | 2,032 | 1.79 | CDP |
| Wellfleet town | 27 | 3,597 | 3,564 | -0.42% | 182 | 19.78 | Town |
| Dennis Port | 28 | 3,334 | 3,523 | 0.33% | 1,097 | 3.04 | CDP |
| Monument Beach | 29 | 3,082 | 3,173 | 0.62% | 1,194 | 2.58 | CDP |
| South Dennis | 30 | 2,966 | 2,895 | -1.49% | 652 | 4.55 | CDP |
| Sandwich | 31 | 2,945 | 2,928 | -0.03% | 813 | 3.62 | CDP |
| West Dennis | 32 | 2,855 | 2,479 | 1.46% | 875 | 3.26 | CDP |
| Buzzards Bay | 33 | 2,777 | 3,208 | -2.53% | 1,449 | 1.92 | CDP |
| Pocasset | 34 | 2,571 | 2,596 | -0.73% | 695 | 3.70 | CDP |
| Truro town | 35 | 2,465 | 2,446 | -0.28% | 118 | 20.95 | Town |
| Harwich Port | 36 | 2,404 | 1,906 | 2.17% | 913 | 2.63 | CDP |
| North Falmouth | 37 | 2,126 | 2,572 | -2.92% | 546 | 3.89 | CDP |
| North Eastham | 38 | 2,012 | 1,741 | 0.7% | 584 | 3.44 | CDP |
| Bourne | 39 | 1,873 | 1,377 | 1.63% | 1,099 | 1.71 | CDP |
| West Falmouth | 40 | 1,807 | 1,836 | 0.28% | 586 | 3.08 | CDP |
| Dennis | 41 | 1,771 | 1,962 | -2.32% | 361 | 4.91 | CDP |
| Chatham | 42 | 1,691 | 1,550 | 1.08% | 641 | 2.64 | CDP |
| West Chatham | 43 | 1,689 | 1,224 | 1.14% | 578 | 2.92 | CDP |
| Orleans | 44 | 1,676 | 1,519 | 0.24% | 722 | 2.32 | CDP |
| Brewster | 45 | 1,674 | 1,347 | -1.3% | 430 | 3.90 | CDP |
| Teaticket | 46 | 1,528 | 1,608 | -0.71% | 1,450 | 1.05 | CDP |
| Mashpee Neck | 47 | 1,338 | 1,403 | 1.75% | 1,057 | 1.27 | CDP |
| Harwich Center | 48 | 1,324 | 1,383 | -2.36% | 589 | 2.25 | CDP |
| Woods Hole | 49 | 1,045 | 933 | 1.75% | 489 | 2.13 | CDP |
| New Seabury | 50 | 743 | 595 | 0.13% | 308 | 2.41 | CDP |
| Seabrook | 51 | 630 | 520 | 1.94% | 1,790 | 0.35 | CDP |
| Popponesset | 52 | 403 | 202 | 3.33% | 1,348 | 0.30 | CDP |
| Seconsett Island | 53 | 146 | 37 | 2.1% | 1,417 | 0.10 | CDP |
| Monomoscoy Island | 54 | 117 | 114 | -1.68% | 504 | 0.23 | CDP |
| Popponesset Island | 55 | 87 | 35 | 6.1% | 1,208 | 0.07 | CDP |
Barnstable Town is the largest city in Barnstable County, with a population of 50,248.
Popponesset Island is the smallest city in Barnstable County.
There are 55 cities in Barnstable County, Massachusetts.