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 20724 Laurel Anne Arundel County 227, 240, 301, 410, 443, 667
MD 20725 Laurel Prince George's County 240
MD 20726 Laurel Prince George's County 240
MD 20731 Capitol Heights Prince George's County 240
MD 20732 Chesapeake Beach Calvert County 227, 240, 301, 410, 443, 667
MD 20733 Churchton Anne Arundel County 410, 443, 667
MD 20735 Clinton Prince George's County 227, 240, 301
MD 20736 Owings Calvert County 227, 240, 301, 410, 443, 667
MD 20737 Riverdale Prince George's County 227, 240, 301
MD 20738 Riverdale Prince George's County 240
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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.