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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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Callahan County ZIP Codes

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

County State ZIP Code City Area Codes
Callahan County TX 76443 Cross Plains 254, 325
Callahan County TX 76469 Putnam 254, 325
Callahan County TX 79504 Baird 254, 325
Callahan County TX 79510 Clyde 325

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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.