All List of zip code Round Rock area? us Round Rock city Post Office Details

Updated: 26-08-2025

Find all Zip Code under city Round Rock area us

List of Zip Codes Round Rock, us Location
City	Zip Code	State	County	Country
Round Rock	78664	TX	Travis	United States
Round Rock	78665	TX	Williamson	United States
Round Rock	78680	TX	Williamson	United States
Round Rock	78681	TX	Williamson	United States
Round Rock	78682	TX	Williamson	United States
Round Rock	78683	TX	Williamson	United States
Round Rock	86547	AZ	Apache	United States

USPS is operated by an 11-person Board of Governors, which resembles the board of directors of a public corporation - the Postmaster General, his deputy (currently vacant), and nine governors appointed by the President and approved by the Senate for seven-year terms.

Check Details Area Round Rock Postal Code.

Round Rock Area Zip Code is 78664 State TX County Travis, United States.
Round Rock Area Zip Code is 78665 State TX County Williamson, United States.
Round Rock Area Zip Code is 78680 State TX County Williamson, United States.
Round Rock Area Zip Code is 78681 State TX County Williamson, United States.
Round Rock Area Zip Code is 78682 State TX County Williamson, United States.
Round Rock Area Zip Code is 78683 State TX County Williamson, United States.
Round Rock Area Zip Code is 86547 State AZ County Apache, United States.

United States Postal Service

The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the United States, including its insular areas and associated states.

What does the US Postal Service do?

The Postal Service provides mail processing and delivery services to individuals and businesses in the U.S.

Who owns and runs the US Postal Service?

Other Some Zip Codes

Why was the US Postal Service created?

Making sure that the mail was delivered as quickly and dependably as possible was critical to the colonies' survival. That's why three months after the battles of Lexington and Concord, the Continental Congress turned to Benjamin Franklin to establish a national post service as the first Postmaster General.

Why postal is important?

An efficient postal service, in addition to promoting national cohesion, provides an essential infrastructure for the expansion of industry and commerce. Postal money transfer and savings services are particularly valuable in developing economies, where banking facilities are limited.