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 78633 Georgetown Williamson County 254, 512, 737
TX 78634 Hutto Williamson County 512, 737
TX 78635 Hye Blanco County 830
TX 78636 Johnson City Blanco County 325, 512, 737, 830
TX 78638 Kingsbury Guadalupe County 512, 737, 830
TX 78639 Kingsland Llano County 325, 512, 737, 830
TX 78640 Kyle Hays County 512, 737
TX 78641 Leander Williamson County 512, 737, 830
TX 78642 Liberty Hill Williamson County 512, 737
TX 78643 Llano Llano County 325, 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.