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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 10530 Hartsdale 914
Westchester County NY 10532 Hawthorne 914
Westchester County NY 10533 Irvington 914
Westchester County NY 10535 Jefferson Valley 845, 914
Westchester County NY 10536 Katonah 914
Westchester County NY 10538 Larchmont 914
Westchester County NY 10540 Lincolndale 914
Westchester County NY 10543 Mamaroneck 914
Westchester County NY 10545 Maryknoll 914
Westchester County NY 10546 Millwood 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.