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
Maps and coordinates
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 20653 Lexington Park St. Mary's County 227, 240, 301, 410, 443, 667
MD 20656 Loveville St. Mary's County 227, 240, 301
MD 20657 Lusby Calvert County 227, 240, 301, 410, 443, 667
MD 20658 Marbury Charles County 227, 240, 301
MD 20659 Mechanicsville St. Mary's County 227, 240, 301, 410, 443, 667
MD 20660 Morganza St. Mary's County 227, 240, 301
MD 20661 Mount Victoria Charles County 227, 240, 301
MD 20662 Nanjemoy Charles County 227, 240, 301
MD 20664 Newburg Charles County 227, 240, 301
MD 20667 Park Hall St. Mary's County 227, 240, 301
Page 5 of 63

Geographic Map of Maryland

Postal context

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.