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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
Chester County PA 19381 West Chester 484
Chester County PA 19382 West Chester 484, 610, 835
Chester County PA 19383 West Chester 484, 610, 835
Chester County PA 19388 West Chester 484
Chester County PA 19390 West Grove 484, 610, 835
Chester County PA 19395 Westtown 484, 610, 835
Chester County PA 19397 Southeastern 484
Chester County PA 19398 Southeastern 484
Chester County PA 19399 Southeastern 484
Chester County PA 19421 Birchrunville 484
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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.