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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.

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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 01904 Lynn 339, 351, 781, 978
Essex County MA 01905 Lynn 339, 781
Essex County MA 01906 Saugus 339, 781
Essex County MA 01907 Swampscott 339, 351, 781, 978
Essex County MA 01908 Nahant 339, 781
Essex County MA 01910 Lynn 339
Essex County MA 01913 Amesbury 351, 603, 978
Essex County MA 01915 Beverly 351, 978
Essex County MA 01921 Boxford 351, 978
Essex County MA 01922 Byfield 351, 978
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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.