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
All states and U.S. territories
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State directory

Maryland ZIP Codes

Complete postal directory, details, and geographic map for the State of Maryland.

State ZIP Code City County Area Codes
MD 20775 Upper Marlboro Prince George's County 240
MD 20776 Harwood Anne Arundel County 227, 240, 301, 410, 443, 667
MD 20777 Highland Howard County 227, 240, 301
MD 20778 West River Anne Arundel County 227, 240, 301, 410, 443, 667
MD 20779 Tracys Landing Anne Arundel County 410, 443, 667
MD 20781 Hyattsville Prince George's County 202, 227, 240, 301, 771
MD 20782 Hyattsville Prince George's County 227, 240, 301
MD 20783 Hyattsville Prince George's County 227, 240, 301
MD 20784 Hyattsville Prince George's County 227, 240, 301
MD 20785 Hyattsville Prince George's County 227, 240, 301
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Geographic Map of Maryland

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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.