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American Community Survey 2021
-- annually updated demographic-economic data to the block group level

Essential data to assess where we are, how things have changed and how things might change in the future down to the sub-neighborhood level. The American Community Survey (ACS) is a nationwide survey designed to provide annually updated demographic-economic data for national and sub-national geography. ACS provides a wide range of important data about people and housing for every community across the nation. The results are used by everyone from planners to retailers to homebuilders and issue stakeholders like you. ACS is a primary source of local data for most of the 40 topics it covers, such as income, education, occupation, language and housing. ProximityOne uses ACS data to develop current estimates on these topics and 5-year projections.

This section is focused on ACS 2021 data access, integration and use. It is frequently updated. Register to receive updates.



ACS 2021 Data Resources ... goto top
  • 2021 ACS 1-year estimates .. September 15, 2022
    .. estimates for areas 65,000 population and over
  • 2021 ACS 1-year supplemental estimates .. October 20, 2022
    .. estimates for areas 65,000 population and over
  • 2021 ACS 5-year estimates "ACS 2017-2021 5-year period" .. December 8, 2022
    .. estimates for all areas down to block group level

  • 2021 ACS 1-year PUMS data .. October 20, 2022
    .. microdata data for custom estimates and individual modeling
  • 2021 ACS 5-year PUMS data "ACS 2017-2021 5-year period" .. January 26, 2022
    .. microdata data for custom estimates and individual modeling



ACS 2021 & Related Data Files & Reports .. developed using DEDE ... goto top

Use the following files/pages to examine characteristics in each area and compare pre- and post-pandemic.
.. these data are not for sale to others; please reference this page as the source for any use; there are no warranties.

  • ACS 2021 1-year estimates .. all 116th Congressional Districts .. selected items
    .. downloadable dbf (open with Excel or merge with DEDE
    .. one row per congressional district
    .. Metadata file

  • ACS 2019 1-year estimates .. all 116th Congressional Districts .. selected items
    .. downloadable dbf (open with Excel or merge with DEDE
    .. one row per congressional district
    .. Metadata file (same as for 2021)

HTML-based comparative analysis reports

  • ACS 2021 1-year estimates .. illustrate comparative report
    .. HTML page comparing (for example) Los Angeles and Orange County, CA

  • ACS 2019 1-year estimates .. illustrate comparative report
    .. HTML page comparing (for example) Los Angeles and Orange County, CA

Using ACS Data; ACS 1-Year versus ACS 5-Year Data .. top

While ACS 1-year estimates are suitable for time-series analyses, the ACS 5-year estimates are not the same as annual demographic-economic estimates and may not be suitable for annual time series analyses.

Advantages of using the 5-year estimates
  • the data are available for all census tracts and ZIP code areas.
  • the data are available for all cities/places, counties and school districts irrespective of size.
Disadvantages of using the 5-year estimates
  • the data are older than the 1-year estimates.
  • the data are for a 5-year period rather than one year.
  • additional cautions in comparing estimates over time (see below).

Advantages of using the 1-year estimates
  • the data are more recent than the 5-year estimates.
  • the data are generally more accurate than the 5-year estimates.
Disadvantages of using the 1-year estimates
  • the data are not available for block groups, census tracts and ZIP code areas.
  • the data are available for only areas of 65,000 population and over.

Additional cautions in comparing estimates over time
  • ACS 2012 5 year estimates are based on survey respondent data for the years 2008 through 2012.
  • ACS 2013 5 year estimates are based on survey respondent data for the years 2009 through 2013.
  • ACS 2014 5 year estimates are based on survey respondent data for the years 2010 through 2014.
  • ACS 2015 5 year estimates are based on survey respondent data for the years 2011 through 2015.
  • ACS 2016 5 year estimates are based on survey respondent data for the years 2012 through 2016.
  • ACS 2017 5 year estimates are based on survey respondent data for the years 2013 through 2017.
  • ACS 2018 5 year estimates are based on survey respondent data for the years 2014 through 2018.
  • ACS 2019 5 year estimates are based on survey respondent data for the years 2015 through 2019.
  • ACS 2020 5 year estimates are based on survey respondent data for the years 2016 through 2020.
  • ACS 2021 5 year estimates are based on survey respondent data for the years 2017 through 2021.
  • The ACS 2012 5 year data & ACS 2013 5 year data
      are based on the same respondent data for the four years 2009 through 2012.
  • The ACS 2013 5 year estimates drop 2008 respondents and add 2013 respondents.
  • The ACS 2014 5 year estimates drop 2009 respondents and add 2014 respondents.
  • The ACS 2015 5 year estimates drop 2010 respondents and add 2015 respondents.
  • The ACS 2016 5 year estimates drop 2011 respondents and add 2016 respondents.
  • The ACS 2017 5 year estimates drop 2012 respondents and add 2017 respondents.
  • The ACS 2018 5 year estimates drop 2013 respondents and add 2018 respondents.
  • The ACS 2019 5 year estimates drop 2014 respondents and add 2019 respondents.
  • The ACS 2020 5 year estimates drop 2015 respondents and add 2020 respondents.
  • The ACS 2021 5 year estimates drop 2016 respondents and add 2021 respondents.

Other considerations
  • Are the needed subject matter available from Census 2010/20?
    - ACS more detailed demographic-economic data (like income) may not be a plus.
  • Census 2010/20 provides more accurate data than ACS estimates.
  • Often there are more detailed age (and other) breakouts for subject matter in Census 2010/20 compared to ACS.
  • The most recent ACS-sourced small area data are from ACS 2021 (December 2022) 5-year estimates;
    - ACS 2021 5-year estimates are centric to 2019.

Areas Published ... goto top
... this general description will be updated with specific ACS 2018 geography soon.
... availability of summary statistic data by type of geography
... link in left column provide access to related interactive tables for specific geographic level.

Geography 1-year estimates
65,000+ population
1-year
Supplemental Estimates
20,000+ population
5-year estimates
All Areas
numberpercent numberpercent number
United States1100%1100%1
Region4100%4100%4
Division9100%9100%9
States, the District of Columbia, and Puerto Rico52100%52100%52
County or equivalent /184126%1,90559%3,221
County Subdivision /22311%1,2083%36,567
Subminor Civil Division (Puerto Rico Only) /3N/AN/AN/AN/A145
Census Tract /3N/AN/AN/AN/A85,395
Block Group /3N/AN/AN/AN/A242,335
Place (incorporated places and census designated places)6342%2,3857%31,908
Consolidated City3N/AN/AN/AN/A8
Alaska Native Regional Corporation325%433%12
American Indian Area/Alaska Native Area/Hawaiian Home Land122%345%704
American Indian Area-Tribal Census Tract /3N/AN/AN/AN/A492
American Indian Area-Tribal Census Tract-Tribal Block Group /3N/AN/AN/AN/A934
Metropolitan Statistical/Micropolitan Statistical Area /451355%90997%939
Principal City of Metropolitan or Micropolitan Statistical Areas40332%79062%1,267
Metropolitan Division31100%31100%31
Combined Statistical Area17198%175100%175
Combined New England City and Town Area7100%7100%7
New England City and Town Area2563%3895%40
Principal Cities of New England City and Town Areas1933%4069%58
New England City and Town Area Division11100%11100%11
Urban Area42912%90025%3,592
Congressional Districts - 116th435100%435100%435
Delegate District - 116th (at Large, District of Columbia)1100%1100%1
Resident Commissioner District - 116th (at Large, Puerto Rico)1100%1100%1
State Legislative District /3, /5 (Upper)N/AN/AN/AN/A1,961
State Legislative District /3, /5 (Lower)N/AN/AN/AN/A4,833
Public Use Microdata Area (2010)2,378100%2,378100%2,378
5 digit ZIP Code Tabulation Area /3N/AN/AN/AN/A33,774
School District (Elementary) /6794%30115%1,969
School District (Secondary) /69219%21143%489
School District (Unified) /68888%3,03728%10,889
Total7,2702%14,8673%464,637

Notes ...
1 County equivalents include Alaska boroughs, municipalities, city and boroughs, and census areas; the District of Columbia; Louisiana parishes; Puerto Rico municipios; independent cities in Maryland, Missouri, Nevada, and Virginia.
2 For 1-year estimates, qualifying Minor Civil Divisions in 20 states only. For 5-year estimates, all county subdivisions.
3 1-year estimates are not produced for this geographic level, regardless of population size.
4 All metropolitan statistical areas receive ACS 1-year estimates. A population minimum of 50,000 is applied instead of the standard 65,000.
5 Legislative session year 2018.
6 In operation as of January 1, 2021.
* Counts based on geographic area boundaries as of January 1, 2021.
** ACS data are not published for blocks.

ProximityOne User Group ... goto top
Join the ProximityOne User Group to keep up-to-date with new developments relating to metros and component geography decision-making information resources. Receive updates and access to tools and resources available only to members. Use this form to join the User Group.

Support Using these Resources
Learn more about accessing and using demographic-economic data and related analytical tools. Join us in a Data Analytics Lab session. There is no fee for these one-hour Web sessions. Each informal session is focused on a specific topic. The open structure also provides for Q&A and discussion of application issues of interest to participants.

Additional Information
ProximityOne develops geodemographic-economic data and analytical tools and helps organizations knit together and use diverse data in a decision-making and analytical framework. We develop custom demographic/economic estimates and projections, develop geographic and geocoded address files, and assist with impact and geospatial analyses. Wide-ranging organizations use our tools (software, data, methodologies) to analyze their own data integrated with other data. Follow ProximityOne on Twitter at www.twitter.com/proximityone. Contact us (888-364-7656) with questions about data covered in this section or to discuss custom estimates, projections or analyses for your areas of interest.


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