US States Zip Codes Directory 2026

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We have 42735 Records of U.S Zip Codes from all over the United States!

Texas Zip Codes



Texas Texas is the second most populous and the second most extensive of the 50 states in the United States of America, and the most extensive state of the 48 contiguous United States. The name, based on the Caddo word tejas meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in East Texas. Located in the South Central United States, Texas shares an international border with the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south, and borders the US states of New Mexico to the west, Oklahoma to the north, Arkansas to the northeast, and Louisiana to the east. Texas has an area of 268,820 square miles (696,200 sq km), and a growing population of 25.7 million residents.

State Zip Code City County Area Codes
TX 78677 Wrightsboro Gonzales County 830
TX 78680 Round Rock Williamson County 512
TX 78681 Round Rock Williamson County 512, 737
TX 78682 Round Rock Williamson County 512
TX 78683 Round Rock Williamson County 512
TX 78691 Pflugerville Travis County 512
TX 78701 Austin Travis County 512, 737
TX 78702 Austin Travis County 512, 737
TX 78703 Austin Travis County 512, 737
TX 78704 Austin Travis County 512, 737
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Map of Texas



ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.


ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.