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 20787 Hyattsville Prince George's County 240
MD 20788 Hyattsville Prince George's County 240
MD 20790 Capitol Heights Prince George's County 240
MD 20791 Capitol Heights Prince George's County 240
MD 20792 Upper Marlboro Prince George's County 240
MD 20794 Jessup Howard County 227, 240, 301, 410, 443, 667
MD 20797 Southern Md Facility Prince George's County 240
MD 20799 Capitol Heights Prince George's County 240
MD 20810 Bethesda Montgomery County 240
MD 20811 Bethesda Montgomery County 240
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Geographic Map of Maryland

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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.