Demographic and Census Information



2020 Census

On August 12, 2021, the US Census Bureau released redistricting data files to states, which included the 2020 population count. According to the Census, as of April 1, 2020 Round Rock’s population was 119,468 (within the city limits).

The US Census Bureau anticipates release of the 2020 Decennial Census data to the public by September 30, 2021. The city will publish a Census report after the data is released to the public.

Historical population

Source: US Census Bureau; figures refer to April 1 of the Census year


City-generated population estimates and projections

The Planning and Development Services Department generates monthly population estimates based on housing units, occupancy, and household size using the most recent Decennial Census as a baseline. 

  • As of September 2021, Round Rock’s estimated population is 123,497 (within the city limits).

Updated city estimates: Upon release of the official April 1, 2020 Census population, the city recalculated its population estimates for April 2020-August 2021 using the 2020 Census figure as a baseline. Previous estimates for those dates had been based on the 2010 Census because the 2020 Census had not yet been released.

Estimates reflecting newly completed single-family units are added monthly. Estimates reflecting newly completed multifamily units are added quarterly in January, April, July, and October.

The Planning and Development Services Department also generates 20-year population projections into the future using the most recent Census as a baseline. A new set of projections is released after each Decennial Census.  Projections for 2021-2040 using 2020 as a baseline will be released later this year.

Other demographic information

Chamber of Commerce

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

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 Surveys.

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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