Round Rock, Williamson County, Texas

Round Rock: City in Texas, United States of America


Round Rock is a city located in the county of Williamson in the U.S. state of Texas. Its population at the 2010 census was 99,887 and a population density of 1,075 people per km². After 10 years in 2020 city had an estimated population of 137,575 inhabitants.

The city was created 172 years ago in 1850.

Quick Facts about Round Rock

Population : 137,575 (2020)
Country : United States of America
State : Texas (United States)
County : Williamson County
Twitter username : roundrock
Postal code : 78680–78683, 78665, 78664
Phone Area Codes : 512
Area : 92.9 km2
Altitude : 735 feet / 224 meters
Establishment : January 01, 1851 (172 years ago)
Time Zone : UTC−06:00
Local time : 13:53:07 (6th June 2023)
Density : 1,481 Pop. per km² as of 2020
Population growth : 27.39% (2010-2020)
Round Rock locator map
Location of Round Rock on Texas map.
Dell diamond 4DM image
Dell diamond 4DM
Dell diamond 4DM image


Round Rock is located at 30°30'30"N 97°40'44"W (30.5082600, -97.6789000).

Round Rock map


The population of Round Rock increased by 27.39% in 10 years.

Year Population % Change Method
2010 99,887 - census
2011 103,864 3.83% estimation process
2012 106,504 2.48% estimation process
2013 109,547 2.78% estimation process
2014 112,665 2.77% estimation process
2015 115,981 2.86% estimation process
2016 120,864 4.04% estimation process
2017 123,684 2.28% estimation process
2018 128,849 4.01% estimation process
2019 133,372 3.39% estimation process
2020 137,575 3.06% estimation process

Round Rock zip code is 78664. County name: Williamson, County fips: 48491

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People born in Round Rock (13)

People born in Round Rock, including entertainer Barbette, activist Juanita Craft, football player; Quarterback Stephen McGee, .


  • Ryan Goins (American professional baseball player) he was born in 13/02/1988
  • Jessica Meuse (American singer-songwriter) she was born in 19/10/1990
  • Leone Cruz (Footballer) he was born in 13/06/1987
  • Bailey Webster (American volleyball player) she was born in 21/07/1991
  • Tyler Patmon (American football player) he was born in 26/01/1991
  • Jarrett Allen (American basketball player) he was born in 21/04/1998
  • Kameron Kelly (American football cornerback) he was born in 19/08/1996
  • Brett Baty (American baseball player) he was born in 13/11/1999
  • Jordan Moore (American basketball player) she was born in 28/11/1996
  • Bert Johnson (American baseball player) he was born in 04/11/1905

Schools in Round Rock

College & universities near Round Rock, TX

Code Name City ZIP
246460 Central Texas Beauty College-Round Rock Round Rock (TX) 78664-4604
451820 The Art Institute of Austin Austin (TX) 78728
480073 South University-Austin Round Rock (TX) 78681-2300
451875 National American University-Austin Austin (TX) 78727-1208
490425 Ann Webb Skin Institute Austin (TX) 78759-3936

Stations (7)

Amtrak & bus stations near Round Rock, TX

Code Name Address Type
TAY Taylor 118 East First St. RAIL
AUS Austin 250 North Lamar Blvd. RAIL
KIL Killeen, Texas 200 East Avenue C BUS
FHD Fort Hood, Texas Hood Road & Old Ironsides Ave. BUS
TPL Temple 315 West Ave B RAIL

Post offices near Round Rock

Post Office Name City ZIP
Round Rock W Post Office Round Rock (TX) 78681
Round Rock Post Office Round Rock (TX) 78664
Mc Neil Post Office Mc Neil (TX) 78651
Pflugervill Post Office Pflugerville (TX) 78660
Balcon Post Office Austin (TX) 78759

Other cities in Williamson County

Cities, Towns, Neighborhoods & Other Populated Places in Williamson County , TX. (more)

City Name Population Title
Georgetown 85,538 City in Texas
Cedar Park 81,040 City in Williamson County, Texas, United States
Leander 70,519 City in Williamson County, Texas, United States
Hutto 29,987 City in Williamson County, Texas, United States
Brushy Creek 21,764 Census designated place
Taylor 17,921 City in Texas, United States
Jollyville 16,151 Census designated place
Anderson Mill 8,744 Census designated place
Jarrell 2,077 City in Williamson County, Texas, United States
Bartlett 1,766 City in Texas
Serenada 1,641 Census designated place
Granger 1,514 City in Williamson County, Texas, United States
Liberty Hill 1,389 City in Williamson County, Texas, United States
Florence 1,304 City in Texas, United States
Thrall 1,014 City in Texas
Coupland 318 Location in Texas, USA

Distance to Other Cities

Round Rock distances to largest Texas cities