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 21092 Long Green Baltimore County 410
MD 21093 Lutherville Timonium Baltimore County 410, 443, 667
MD 21094 Lutherville Timonium Baltimore County 410
MD 21098 Hanover Anne Arundel County 410
MD 21102 Manchester Carroll County 223, 410, 443, 667, 717
MD 21104 Marriottsville Howard County 410, 443, 667
MD 21105 Maryland Line Baltimore County 410, 443, 667
MD 21106 Mayo Anne Arundel County 410
MD 21108 Millersville Anne Arundel County 410, 443, 667
MD 21111 Monkton Baltimore County 410, 443, 667
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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.