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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
Dorchester County MD 21613 Cambridge 410, 443, 667
Dorchester County MD 21622 Church Creek 410, 443, 667
Dorchester County MD 21626 Crapo 410, 443, 667
Dorchester County MD 21627 Crocheron 410, 443, 667
Dorchester County MD 21631 East New Market 410, 443, 667
Dorchester County MD 21634 Fishing Creek 410, 443, 667
Dorchester County MD 21643 Hurlock 410, 443, 667
Dorchester County MD 21648 Madison 410, 443, 667
Dorchester County MD 21659 Rhodesdale 410, 443, 667
Dorchester County MD 21664 Secretary 410, 443, 667
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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.