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
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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 21613 Cambridge Dorchester County 410, 443, 667
MD 21617 Centreville Queen Anne's County 410, 443, 667
MD 21619 Chester Queen Anne's County 410, 443, 667
MD 21620 Chestertown Kent County 410, 443, 667
MD 21622 Church Creek Dorchester County 410, 443, 667
MD 21623 Church Hill Queen Anne's County 410, 443, 667
MD 21624 Claiborne Talbot County 410, 443, 667
MD 21625 Cordova Talbot County 410, 443, 667
MD 21626 Crapo Dorchester County 410, 443, 667
MD 21627 Crocheron Dorchester 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.