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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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Worcester County ZIP Codes

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

County State ZIP Code City Area Codes
Worcester County MA 01005 Barre 351, 413, 508, 774, 978
Worcester County MA 01031 Gilbertville 413, 508, 774
Worcester County MA 01037 Hardwick 351, 413, 978
Worcester County MA 01068 Oakham 351, 508, 774, 978
Worcester County MA 01074 South Barre 351, 978
Worcester County MA 01083 Warren 413, 508, 774
Worcester County MA 01092 West Warren 413
Worcester County MA 01094 Wheelwright 351, 413, 508, 774, 978
Worcester County MA 01331 Athol 351, 978
Worcester County MA 01366 Petersham 351, 413, 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.