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 21557 Rawlings Allegany County 227, 240, 301, 304, 681
MD 21560 Spring Gap Allegany County 227, 240, 301
MD 21561 Swanton Garrett County 227, 240, 301, 304, 681
MD 21562 Westernport Allegany County 227, 240, 301, 304, 681
MD 21601 Easton Talbot County 410, 443, 667
MD 21606 Easton Talbot County 410
MD 21607 Barclay Queen Anne's County 410, 443, 667
MD 21609 Bethlehem Caroline County 410
MD 21610 Betterton Kent County 410, 443, 667
MD 21612 Bozman 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.