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U.S. ZIP Codes Database 2026

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Calhoun County ZIP Codes

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

County State ZIP Code City Area Codes
Calhoun County SC 29030 Cameron 803, 839
Calhoun County SC 29135 Saint Matthews 803, 839
Calhoun County TX 77978 Point Comfort 361
Calhoun County TX 77979 Port Lavaca 361
Calhoun County TX 77982 Port O Connor 361
Calhoun County TX 77983 Seadrift 361
Calhoun County WV 25234 Arnoldsburg 304, 681
Calhoun County WV 25235 Chloe 304, 681
Calhoun County WV 25261 Millstone 304, 681
Calhoun County WV 25268 Orma 304, 681
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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.