RoadsideThoughts
A Gazetteer for the United States and Canada
Home >> State of Texas >> Williamson County >> Round RockIndex...

Welcome to Round Rock ...

The city of Round Rock is located in Hill Country.

Round Rock is primarily located in Williamson County<1>. A portion of Round Rock extends into Travis County.

The community of Round Rock was established in 1851.

From the  Census Estimates for 2019, Round Rock has a population of 133,579 people<2> (see below for details).

Round Rock is 720 feet [219 m] above sea level.<3>.

Time Zone: Round Rock lies in the Central Time Zone (CST/CDT) and observes daylight saving time

Area Codes for Round Rock: 512 & 737<4>

The ZIP codes for Round Rock: 78664-78665, 78680-78683<5>

Population Details ...

Taken from the 2019 Census Estimates, Round Rock had an population of 133,579 people. This is an increase of 33.73% since the 2010 Census (or an increase of 118.49% since the 2000 Census).

At the time of the 2010 Census, Round Rock had a population of 99,887 people (which is 23.43% of the total population of Williamson County). This makes Round Rock the county's most populous community.

The population of Round Rock represents 0.4% of the population of Texas (which has 25,145,561 people), making it the state's 31st most populous community.

With a 2010 count of 99,887 people, the population of Round Rock increased 63.38% from the 2000 Census (which had a count of 61,136 people).

More information can be found on the Census Page for Round Rock.

Communities Also Named Round Rock ...

Using our Gazetteer, we found that there are 2 communities that are also named Round Rock - they are located in Arizona and Tennessee.

For more information, see our Tidbits & Trivia Page for Round Rock.

Websites for Round Rock ...

Official Website:   www.ci.round-rock.tx.us/

Chamber of Commerce:   www.roundrockchamber.org/

Communities near Round Rock ...

We have created a list of 10 communities that are near Round Rock.

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Round Rock. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Round Rock.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Round Rock. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Round Rock.

We also have a detailed list of newspapers that have been published in the area around Round Rock. Our list includes 6 papers. See our Newspapers Page for Round Rock.

TripAdvisor Tourism Pages for Round Rock ...

Looking for more information about Round Rock? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

In addition to the Tourism page for Round Rock, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Round Rock.

Adding Round Rock to Our Gazetteer ...

We originally found mention of Round Rock in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found (so far) for Round Rock was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<7>

From that list, the Round Rock post office opened in 1854.

For more details, see References and Mentions for Round Rock.

Footnotes ...

<1>If you're interested in how the shape of Texas' counties, including Williamson, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Round Rock.
<3>The elevation is an estimate for the area around Round Rock - it will be higher in some places and lower in others.
<4>When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 512 code has been Overlayed with the 737 area code. New phone numbers in the Round Rock area will be assigned with one of these codes: 512 or 737. As a result, placing a call in the Round Rock area will require 10-digit dialing (where you enter both the area code and then the phone number).
<5>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Round Rock). When looking for a ZIP Code, whether Round Rock or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

Our list of ZIP Codes for Round Rock includes: 78664, 78680, 78681, 78682 & 78683.
<6>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<7>A copy of the Blevins & Helbock Post Office list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/