City-generated population estimates
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 December 2021, Round Rock’s estimated population is 124,128 (within the city limits).
*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.
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.
City-generated population projections
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.
- Population projections 2010-2030 (pdf) using the 2010 Census as the base year
US Census Bureau
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).
- 2020 Census Release Report (pdf) 10/1/21
This report provides 2020 Census data compared to 2010 Census data for Round Rock. The Census establishes a baseline for the city’s population estimates and projections.
Data highlights from 2020 Census release
American Community Survey (ACS)
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. The ACS also combines annual surveys into 5-year estimates, which are more accurate but less current than the 1-year estimates.
2020 ACS: Release of the 2020 ACS data was delayed due to difficulties resulting from Covid-19 and has been published as the 2020 ACS 1-Year Experimental Data Release. As of December 2021 the tables do not reflect data below the state level.
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
- U.S. Bureau of the Census (main)
- Explore Census Data
- American Community Survey
- Economic Census
- Educational Resources – Statistics in Schools
- Genealogy information (note: for privacy reasons, Census information about individuals is not available to the public for 72 years; the most recent Census currently available is from 1930)
- Census History