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  2. What is the zip code of Round Rock, TX, 78664

Round Rock (TX) Zip Code is 78664 Latest Details Sep, 2025

Updated: 29-09-2025

Round Rock (TX) zip Code is 78664, Postal Code details. Round Rock is located in state TX, United States.

Find Zip Code 78664 Details

ZIP code 78664 is located in Round Rock TX in the United States.

Postal Code United States Zip Code 78664 Latest update Round Rock, TX
Zip Code / Postal Code 78664

City

Round Rock

State Code

TX

County

Travis, United States

Postal Locations

Round Rock, TX - Zip Code is - 78664

Postal

United States Postal Service USPS Link

Delivery Type

Package Delivery and first class mail.

The zip code 78664 is an essential part of the postal system in Round Rock, TX. Located in a vibrant part of the city, this zip code covers a variety of neighborhoods, offering residents and businesses a unique blend of suburban comfort and urban convenience. Whether you're looking to send mail, relocate, or simply learn more about the area, Round Rock has a lot to offer.

FAQ about Zip Code 78664, Round Rock, (TX)

What is Zip code Round Rock?

Round Rock Zip Code: 78664, used by the Round Rock Post Office and USPS, is a Zone Improvement Plan code that ensures faster, accurate mail delivery in Travis, TX. Represented by the American Postal Workers Union (APWU), USPS oversees postal operations.

What is Postal code of area Round Rock?

Round Rock Postal Code is: 78664

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