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 20740 College Park Prince George's County 227, 240, 301
MD 20741 College Park Prince George's County 240
MD 20742 College Park Prince George's County 227, 240, 301
MD 20743 Capitol Heights Prince George's County 202, 227, 240, 301, 771
MD 20744 Fort Washington Prince George's County 227, 240, 301
MD 20745 Oxon Hill Prince George's County 202, 227, 240, 301, 771
MD 20746 Suitland Prince George's County 202, 227, 240, 301, 771
MD 20747 District Heights Prince George's County 227, 240, 301
MD 20748 Temple Hills Prince George's County 202, 227, 240, 301, 771
MD 20749 Fort Washington Prince George's County 240
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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.