Round Rock TX ZIP Code

Round Rock city is located in Texas State, Williamson County and has a unique zip code assigned by the US Postal Service Office.


You can search for the Round Rock TX zip code by its streets and block numbers if we have some of the Round Rock streets loaded in our website

Round Rock Area Code is 512 and Time Zone is Central (GMT -06:00).



Round Rock Zip Code - Texas

The US ZIP Code basic format consists of five decimal numerical digits assigned to the Round Rock City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Round Rock ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Round Rock, Texas.

The Round Rock Zip Code is 78664, 78665, 78680, 78681, 78682, 78683.



If you want to send a mail to Round Rock City, you should use the 78664, 78665, 78680, 78681, 78682, 78683 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Round Rock ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 78664, 78665, 78680, 78681, 78682, 78683 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Round Rock city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Texas.


Round Rock, Texas - MAP



What is the Round Rock Zip Code?

The Round Rock Zip Code in Texas is 78664, 78665, 78680, 78681, 78682, 78683.


ZIP Plus 4 Round Rock - US Streets Zip Codes

By pressing keys ctrol + F you can search Round Rock zip codes by its streets, highways, and know the ZIP+4 US ZIP Code


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Search Round Rock Zip Code

What is the zip code for Round Rock TX?

78664, 78665, 78680, 78681, 78682, 78683

Round Rock, Texas - US Zip Code



Round Rock ZIP Code Lookup

78664, 78665, 78680, 78681, 78682, 78683 Zip Code File:
Zip Code: 78664, 78665, 78680, 78681, 78682, 78683,
City: Round Rock
Round Rock Area Code: 512
Round Rock, TX - Time Zone: Central (GMT -06:00)
County: Williamson
City Alias: Old Round Rock, Three Point, Round Rock, Round Rock, Round Rock, Round Rock, Dell Computers, Round Rock, Round Rock
State: Texas
State Abb: TX



Texas Zip+4 - Nearby Round Rock Cities

Cities near Round Rock in Texas
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