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.

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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 78612 Cedar Creek Bastrop County 512, 737
TX 78613 Cedar Park Williamson County 512, 737
TX 78614 Cost Gonzales County 830
TX 78615 Coupland Travis County 512, 737
TX 78616 Dale Caldwell County 512, 737, 830
TX 78617 Del Valle Travis County 512, 737
TX 78618 Doss Gillespie County 325, 830
TX 78619 Driftwood Hays County 512, 737
TX 78620 Dripping Springs Hays County 512, 737, 830
TX 78621 Elgin Bastrop County 512, 737
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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.