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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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Barnstable County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Barnstable County.

County State ZIP Code City Area Codes
Barnstable County MA 02633 Chatham 508, 774
Barnstable County MA 02634 Centerville 508
Barnstable County MA 02635 Cotuit 508, 774
Barnstable County MA 02636 Centerville 508
Barnstable County MA 02637 Cummaquid 508, 774
Barnstable County MA 02638 Dennis 508, 774
Barnstable County MA 02639 Dennis Port 508, 774
Barnstable County MA 02641 East Dennis 508, 774
Barnstable County MA 02642 Eastham 508, 774
Barnstable County MA 02643 East Orleans 508, 774
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.