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U.S. ZIP Codes Database 2026

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Charles County ZIP Codes

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

County State ZIP Code City Area Codes
Charles County MD 20601 Waldorf 227, 240, 301
Charles County MD 20602 Waldorf 227, 240, 301
Charles County MD 20603 Waldorf 227, 240, 301
Charles County MD 20604 Waldorf 240
Charles County MD 20611 Bel Alton 227, 240, 301
Charles County MD 20612 Benedict 227, 240, 301, 410, 443, 667
Charles County MD 20616 Bryans Road 227, 240, 301
Charles County MD 20617 Bryantown 227, 240, 301
Charles County MD 20622 Charlotte Hall 227, 240, 301
Charles County MD 20625 Cobb Island 227, 240, 301
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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.