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 20622 Charlotte Hall Charles County 227, 240, 301
MD 20623 Cheltenham Prince George's County 227, 240, 301
MD 20624 Clements St. Mary's County 227, 240, 301
MD 20625 Cobb Island Charles County 227, 240, 301
MD 20626 Coltons Point St. Mary's County 227, 240, 301
MD 20627 Compton St. Mary's County 240
MD 20628 Dameron St. Mary's County 227, 240, 301
MD 20629 Dowell Calvert County 410, 443, 667
MD 20630 Drayden St. Mary's County 227, 240, 301
MD 20632 Faulkner Charles County 227, 240, 301
Page 3 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.