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 21113 Odenton Anne Arundel County 227, 240, 301, 410, 443, 667
MD 21114 Crofton Anne Arundel County 227, 240, 301, 410, 443, 667
MD 21117 Owings Mills Baltimore County 410, 443, 667
MD 21120 Parkton Baltimore County 223, 410, 443, 667, 717
MD 21122 Pasadena Anne Arundel County 410, 443, 667
MD 21123 Pasadena Anne Arundel County 410
MD 21128 Perry Hall Baltimore County 410, 443, 667
MD 21130 Perryman Harford County 410, 443, 667
MD 21131 Phoenix Baltimore County 410, 443, 667
MD 21132 Pylesville Harford County 223, 410, 443, 667, 717
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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.