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
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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 21817 Crisfield Somerset County 410, 443, 667
MD 21821 Deal Island Somerset County 410, 443, 667
MD 21822 Eden Wicomico County 410, 443, 667
MD 21824 Ewell Somerset County 410, 443, 667
MD 21826 Fruitland Wicomico County 410, 443, 667
MD 21829 Girdletree Worcester County 410, 443, 667
MD 21830 Hebron Wicomico County 410, 443, 667
MD 21835 Linkwood Dorchester County 410, 443, 667
MD 21836 Manokin Somerset County 410
MD 21837 Mardela Springs Wicomico County 302, 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.