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

Delaware ZIP Codes

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

State ZIP Code City County Area Codes
DE 19944 Fenwick Island Sussex County 302, 410, 443, 667
DE 19945 Frankford Sussex County 302, 410, 443, 667
DE 19946 Frederica Kent County 302
DE 19947 Georgetown Sussex County 302
DE 19950 Greenwood Sussex County 302, 410, 443, 667
DE 19951 Harbeson Sussex County 302
DE 19952 Harrington Kent County 302, 410, 443, 667
DE 19953 Hartly Kent County 302, 410, 443, 667
DE 19954 Houston Kent County 302
DE 19955 Kenton Kent County 302
Page 8 of 10

Geographic Map of Delaware

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.