Demographic and Census Information



City-generated population estimates and projections

The Planning and Development Services Department generates monthly population estimates and future population projections based on recent development activity. The population estimate is updated monthly to reflect completed single-family units, and completed multifamily units are added twice a year in October and April. Projections are adjusted every ten years as decennial Census figures are released. 

The City’s Economic Development partnership with the Chamber of Commerce compiles additional demographic information from a variety of sources.

2020 Census

The US Census Bureau’s anticipated release date for the 2020 Decennial Census is September 23, 2021.  PDS continues to provide monthly population estimates with a base year of 2010. Population projections will not be updated until after we have new 2020 baseline data from the 2020 Census.

2010 Census

2010 Census data for Texas was released in February 2011. The Census is a population count of everyone in the US taken every ten years. Decennial Census data are used to allocate states’ congressional seats, to make decisions about what community services to provide, and to distribute more than $300 billion in federal funds to local, state, and tribal governments each year.

  • City Profile of select tables from the 2010 Census and 2019 American Community Survey (1-year and 5-year) (pdf)
  • CityView interactive GIS viewer now includes 2010 Census data

Summary of 2010 Census data for Round Rock

SubjectTotal18 years and over  
 Number PercentNumberPercent
Total Population 99,887100%68,857100%
    One race:96,08996.2%67,159 97.5%
         Black/African-American9,7449.8% 6,411 9.3%
         American Indian/Alaskan6780.7%458 0.7%
         Native Pacific Islander1240.1% 93 0.1%
         Some other race9,6719.7% 6,261 9.1%
     Two or more races3,7983.8% 1,698 2.5%
Hispanic or Latino (any race)28,95829.0%17,83625.9%
     Not Hispanic or Latino (any race) 70,929 71.0%51,02174.1%
Total Housing Units  37,223 100%n/a n/a
     Occupied housing units 35,050 94.2%n/a n/a
     Vacant housing units 2,173 5.8%n/a n/a

Quick comparison of recent Censuses

(source: US Census; figures refer to April 1 of the Census year)

1 This Metropolitan Statistical area is now named the “Austin-Round Rock MSA,” although in earlier decennial Censuses it was referred to as the “Austin-San Marcos MSA.”
2 The Austin-San Marcos MSA in 1990 and 1980 was defined as Travis, Williamson and Hays Counties; populations of Bastrop and Caldwell Counties have been added so that the MSA geographies match later Censuses.
City of Round Rock 99,887 61,136 30,923 12,740
Williamson County 422,679 249,967 139,551 76,524
Austin-Round Rock MSA1 1,716,289 1,249,763 846,2272 585,0512
State of Texas 25,145,561 20,851,820 16,986,510 14,229,288
United States 308,745,538 282,171,936 248,709,873 226,545,805

Historical population


Decennial Census for Round Rock Since 1850 (pdf)
(source: US Census; figures refer to April 1 of the Census year)

American Community Survey

The US Census Bureau also collects a wealth of demographic information annually through the American Community Survey (ACS). Surveys are sent to only a sampling of households, so ACS data are estimates, not 100% counts. This allows responses to be processed and reported much more quickly than the decennial Census. Survey data is also grouped into 3-year and 5-year estimates. These multi-year estimates are generally more accurate because of the combined sample size, but are less current than the 1-year estimates.

  • City Profile (pdf) of select tables from the 2010 Census and 2019 American Community Survey.

Economic Census and Survey

The Bureau also collects the Economic Census  every five years (those ending in ’02 and ’07), and an annual Economic Survey. The economic census provides a detailed portrait of the United States’ economy once every five years, from the national to the local level. There also are several related programs, including statistics on minority- and women-owned businesses. The Census of Governments is conducted at the same time. The Census of Agriculture is now conducted by the US Department of Agriculture.

Census Bureau links  

For more information, contact Joelle Jordan at 512-218-5422.

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