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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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Chester County ZIP Codes

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

County State ZIP Code City Area Codes
Westchester County NY 10805 New Rochelle 347, 718, 914, 917, 929
Chester County PA 19087 Wayne 484, 610, 835
Chester County PA 19301 Paoli 484, 610, 835
Chester County PA 19310 Atglen 223, 484, 610, 717, 835
Chester County PA 19311 Avondale 484, 610, 835
Chester County PA 19312 Berwyn 484, 610, 835
Chester County PA 19316 Brandamore 484, 610, 835
Chester County PA 19318 Chatham 484, 610, 835
Chester County PA 19320 Coatesville 223, 484, 610, 717, 835
Chester County PA 19330 Cochranville 223, 484, 610, 717, 835
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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.