U.S. postal lookup

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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Nassau County ZIP Codes

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

County State ZIP Code City Area Codes
Nassau County NY 11530 Garden City 363, 516
Nassau County NY 11531 Garden City 516
Nassau County NY 11535 Garden City 516
Nassau County NY 11536 Garden City 516
Nassau County NY 11542 Glen Cove 363, 516
Nassau County NY 11545 Glen Head 363, 516
Nassau County NY 11547 Glenwood Landing 363, 516
Nassau County NY 11548 Greenvale 363, 516
Nassau County NY 11549 Hempstead 363, 516
Nassau County NY 11550 Hempstead 363, 516
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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.