Founded in 1685, Barnstable County is one of 14 counties in the state of Massachusetts. Historically, Barnstable County was one of three original counties created in the Plymouth Colony. The city of Barnstable is the county seat. With FIPS code of 1, Barnstable County has a population of 232,411 and area of 396 square miles (1,026 km2).
List of all cities in Barnstable County, MA alphabetically
| City/Town | Postal Code | Area Code |
| Barnstable, MA | 02630 | 508/774 |
| 02634 | 508/774 | |
| Bass River, MA | 02664 | 508/774 |
| Bourne, MA | 02532 | 508/774 |
| 02559 | 508/774 | |
| Brewster, MA | 02631 | 508/774 |
| Buzzards Bay, MA | 02532 | 508/774 |
| 02542 | 508/774 | |
| Cataumet, MA | 02534 | 508/774 |
| Centerville, MA | 02632 | 508/774 |
| 02634 | 508/774 | |
| 02636 | 508/774 | |
| Chatham, MA | 02633 | 508/774 |
| Cotuit, MA | 02635 | 508/774 |
| Cummaquid, MA | 02637 | 508/774 |
| Dennis, MA | 02638 | 508/774 |
| Dennis Port, MA | 02639 | 508/774 |
| Ea Falmouth, MA | 02536 | 508/774 |
| East Dennis, MA | 02641 | 508/774 |
| East Falmouth, MA | 02536 | 508/774 |
| East Harwich, MA | 02645 | 508/774 |
| East Orleans, MA | 02643 | 508/774 |
| East Sandwich, MA | 02537 | 508/774 |
| Eastham, MA | 02642 | 508/774 |
| Falmouth, MA | 02540 | 508/774 |
| 02541 | 508/774 | |
| 02543 | 508/774 | |
| Forestdale, MA | 02644 | 508/774 |
| Harwich, MA | 02645 | 508/774 |
| Harwich Port, MA | 02646 | 508/774 |
| Hatchville, MA | 02536 | 508/774 |
| Hyannis, MA | 02601 | 508/774 |
| Hyannis Port, MA | 02647 | 508/774 |
| Marstons Mills, MA | 02648 | 508/774 |
| Mashpee, MA | 02649 | 508/774 |
| Monument Beach, MA | 02553 | 508/774 |
| New Seabury, MA | 02649 | 508/774 |
| North Chatham, MA | 02650 | 508/774 |
| North Eastham, MA | 02651 | 508/774 |
| North Falmouth, MA | 02556 | 508/774 |
| 02565 | 508/774 | |
| North Truro, MA | 02652 | 508/774 |
| Orleans, MA | 02653 | 508/774 |
| Osterville, MA | 02655 | 508/774 |
| Otis Air National Guard, MA | 02542 | 508/774 |
| Pocasset, MA | 02559 | 508/774 |
| Provincetown, MA | 02657 | 508/774 |
| Sagamore, MA | 02561 | 508/774 |
| Sagamore Beach, MA | 02562 | 508/774 |
| Sandwich, MA | 02563 | 508/774 |
| 02644 | 508/774 | |
| Silver Beach, MA | 02565 | 508/774 |
| So Yarmouth, MA | 02664 | 508/774 |
| South Chatham, MA | 02659 | 508/774 |
| South Dennis, MA | 02660 | 508/774 |
| South Harwich, MA | 02661 | 508/774 |
| South Mashpee, MA | 02649 | 508/774 |
| South Orleans, MA | 02662 | 508/774 |
| South Wellfleet, MA | 02663 | 508/774 |
| South Yarmouth, MA | 02664 | 508/774 |
| 02673 | 508/774 | |
| Teaticket, MA | 02536 | 508/774 |
| Truro, MA | 02666 | 508/774 |
| Waquoit, MA | 02536 | 508/774 |
| Wellfleet, MA | 02667 | 508/774 |
| West Barnstable, MA | 02668 | 508/774 |
| West Chatham, MA | 02669 | 508/774 |
| West Dennis, MA | 02670 | 508/774 |
| West Falmouth, MA | 02574 | 508/774 |
| West Harwich, MA | 02671 | 508/774 |
| West Hyannisport, MA | 02672 | 508/774 |
| West Yarmouth, MA | 02673 | 508/774 |
| Woods Hole, MA | 02543 | 508/774 |
| Yarmouth, MA | 02664 | 508/774 |
| 02673 | 508/774 | |
| 02675 | 508/774 | |
| Yarmouth Port, MA | 02675 | 508/774 |