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 21653 Newcomb Talbot County 410, 443, 667
MD 21654 Oxford Talbot County 410, 443, 667
MD 21655 Preston Caroline County 410, 443, 667
MD 21656 Price Queen Anne's County 410
MD 21657 Queen Anne Queen Anne's County 410, 443, 667
MD 21658 Queenstown Queen Anne's County 410, 443, 667
MD 21659 Rhodesdale Dorchester County 410, 443, 667
MD 21660 Ridgely Caroline County 410, 443, 667
MD 21661 Rock Hall Kent County 410, 443, 667
MD 21662 Royal Oak Talbot 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.