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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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Westchester County ZIP Codes

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

County State ZIP Code City Area Codes
Westchester County NY 10547 Mohegan Lake 845, 914
Westchester County NY 10548 Montrose 914
Westchester County NY 10549 Mount Kisco 914
Westchester County NY 10550 Mount Vernon 347, 718, 914, 917, 929
Westchester County NY 10551 Mount Vernon 914
Westchester County NY 10552 Mount Vernon 914
Westchester County NY 10553 Mount Vernon 914
Westchester County NY 10557 Mount Vernon 914
Westchester County NY 10558 Mount Vernon 914
Westchester County NY 10560 North Salem 203, 475, 845, 914
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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.