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
County directory

Essex County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Essex County.

County State ZIP Code City Area Codes
Essex County MA 01923 Danvers 351, 978
Essex County MA 01929 Essex 351, 978
Essex County MA 01930 Gloucester 351, 978
Essex County MA 01931 Gloucester 351
Essex County MA 01936 Hamilton 351, 978
Essex County MA 01937 Hathorne 351, 978
Essex County MA 01938 Ipswich 351, 978
Essex County MA 01940 Lynnfield 339, 351, 781, 978
Essex County MA 01944 Manchester 351, 978
Essex County MA 01945 Marblehead 339, 351, 781, 978
Page 4 of 16

Geographic Map of Essex County

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.