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

Delaware ZIP Codes

Complete postal directory, details, and geographic map for the State of Delaware.

State ZIP Code City County Area Codes
DE 19969 Nassau Sussex County 302
DE 19970 Ocean View Sussex County 302
DE 19971 Rehoboth Beach Sussex County 302
DE 19973 Seaford Sussex County 302, 410, 443, 667
DE 19975 Selbyville Sussex County 302, 410, 443, 667
DE 19977 Smyrna Kent County 302
DE 19979 Viola Kent County 302
DE 19980 Woodside Kent County 302
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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.