U.S. postal lookup

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.

42,735 verified records
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Texas ZIP Codes

Complete postal directory, details, and geographic map for the State of Texas.

State ZIP Code City County Area Codes
TX 78666 San Marcos Hays County 512, 737, 830
TX 78667 San Marcos Hays County 512
TX 78669 Spicewood Travis County 512, 737, 830
TX 78670 Staples Guadalupe County 512, 737, 830
TX 78671 Stonewall Gillespie County 830
TX 78672 Tow Llano County 325, 512, 737
TX 78673 Walburg Williamson County 512
TX 78674 Weir Williamson County 512, 737
TX 78675 Willow City Gillespie County 325, 830
TX 78676 Wimberley Hays County 512, 737, 830
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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.