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.

42,735 verified records
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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 11041 New Hyde Park 516
Nassau County NY 11042 New Hyde Park 363, 516
Nassau County NY 11043 New Hyde Park 516
Nassau County NY 11044 New Hyde Park 516
Nassau County NY 11050 Port Washington 363, 516
Nassau County NY 11051 Port Washington 516
Nassau County NY 11052 Port Washington 516
Nassau County NY 11053 Port Washington 516
Nassau County NY 11054 Port Washington 516
Nassau County NY 11055 Port Washington 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.