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 20763 Savage Howard County 227, 240, 301
MD 20764 Shady Side Anne Arundel County 227, 240, 301, 410, 443, 667
MD 20765 Galesville Anne Arundel County 227, 240, 301, 410, 443, 667
MD 20768 Greenbelt Prince George's County 240
MD 20769 Glenn Dale Prince George's County 227, 240, 301
MD 20770 Greenbelt Prince George's County 227, 240, 301
MD 20771 Greenbelt Prince George's County 227, 240, 301
MD 20772 Upper Marlboro Prince George's County 227, 240, 301, 410, 443, 667
MD 20773 Upper Marlboro Prince George's County 240
MD 20774 Upper Marlboro Prince George's County 227, 240, 301, 410, 443, 667
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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.