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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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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 11020 Great Neck 363, 516
Nassau County NY 11021 Great Neck 363, 516
Nassau County NY 11022 Great Neck 516
Nassau County NY 11023 Great Neck 363, 516
Nassau County NY 11024 Great Neck 363, 516
Nassau County NY 11025 Great Neck 516
Nassau County NY 11026 Great Neck 516
Nassau County NY 11027 Great Neck 516
Nassau County NY 11030 Manhasset 363, 516
Nassau County NY 11040 New Hyde Park 347, 363, 516, 718, 917, 929
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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.