2020 ACS 1-Year Experimental Data Release
Overview
Due to the impact of the COVID-19 pandemic, the Census Bureau changed the 2020 American Community Survey (ACS) release schedule. Instead of providing the standard 1-year data products, the Census Bureau released experimental estimates from the 1-year data.
This includes a limited number of data tables for the nation, states, and the District of Columbia. The 2020 ACS 1-year experimental estimates are posted on the 2020 ACS 1-Year Experimental Data Tables page; they are not available on data.census.gov.
Resources for Data Users
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FlyerACS Resource HubJuly 2021Connect to data experts and the many other resources available for learning more about the American Community Survey.
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Flyer2020 ACS 1-Year Estimates What You Need to KnowJuly 2021Determine if you are impacted by the changes related to the 2020 American Community Survey data release in this flow chart.
Data and Documentation
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Experimental Data Product2020 ACS 1-Year Experimental Data TablesView the list of tables and supporting documentation for the 2020 ACS 1-year Experimental data release. -
Public Use Microdata Sample (PUMS)2020 ACS 1-Year Public Use Microdata Sample with Experimental WeightsAccess data and documentation for the 2020 ACS 1-year Public Use Microdata Sample (PUMS) with Experimental Weights. -
Code Lists, Definitions, and AccuracyView the detailed codes and definitions for variables, statistical testing, and an explanation of sample design, methodology, and accuracy for the ACS. -
Sample Size and Data QualityExplore quality measures for the American Community Survey, including sample size, response rates, coverage rates, and item allocation rates. -
User Notes2019 ACS 1-Year PUMS with Experimental Weights
Explore More
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Working PaperAddressing Nonresponse Bias in the ACS Using Administrative DataLearn how the pandemic disrupted ACS data collection in 2020 and why the 2020 ACS 1-year estimates will be released as an experimental product. -
Working PaperAn Assessment of the COVID-19 Pandemic’s Impact on the 2020 ACS 1-Year DataLearn how the pandemic disrupted ACS data collection in 2020 and why the 2020 ACS 1-year estimates will be released as an experimental product. -
2020 Data Release ScheduleReview the dates and components of the 2020 ACS release. -
2020 Data Release New and NotableLearn more about items of interest related to the 2020 ACS release. -
Experimental Data ProductAmerican Community Survey Experimental Data FAQsExplore the most frequently asked questions about American Community Survey (ACS) Experimental Data.
News and Blogs
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Press ReleaseCensus Bureau Releases Experimental 2020 American Community Survey 1-Year DataThe U.S. Census Bureau today released experimental 1-year estimates from the American Community Survey (ACS). -
Random Samplings BlogAn Overview of Addressing Nonresponse Bias in the American Community Survey During the COVID-19 Pandemic Using Administrative DataIn this blog we will discuss an important modification to the American Community Survey (ACS)’s weighting procedures for the 2020 experimental data. -
Press Kit2020 American Community Survey 1-Year Experimental Data ReleaseThe Census Bureau released experimental estimates and products from the 1-year ACS data instead of the traditional 1-year estimates. -
Press ReleaseCensus Bureau to Host Webinar on Release of American Community Survey 1-Year Experimental DataA webinar to explain and answer questions about the release of estimates from the 2020 ACS 1-year data using experimental weights. -
Random Samplings BlogPandemic Impact on 2020 American Community Survey 1-Year DataAnalytical report detailing the decision to not release the standard 2020 1-year ACS data products. -
Press ReleaseCensus Bureau Releases Analytical Report on COVID-19 Impact on the 2020 American Community SurveyThe U.S. Census Bureau today released an analytical report in advance of publishing experimental data from the ACS. -
Random Samplings BlogCollecting ACS Data From Group Quarters Amid the PandemicThis blog explains how the pandemic disrupted our ability to collect American Community Survey data from group quarters. -
Press ReleaseCensus Bureau Announces Changes for 2020 ACS 1-Year EstimatesThe U.S. Census Bureau will not release its standard 1-year estimates from the 2020 ACS ) because of the impacts of the COVID-19 pandemic on data collection. -
Press ReleaseStatement on Differences Between 2020 Census and ACS 1-Year EstimatesThe data collection methods for the 2020 Census and the ACS are different and so is the impact of the COVID-19 pandemic on the programs. -
Press ReleaseCensus Bureau Announces Key Dates for Upcoming ReleasesThe U.S. Census Bureau’s schedule for the release of 2020 Census redistricting data; the 2020 income, poverty and health insurance coverage statistics. -
Random Samplings BlogAdapting the American Community Survey Amid COVID-19We adapted the American Community Survey amid the pandemic to keep both the nation informed, and our staff and the people who respond safe.
Related Information
Page Last Revised - May 1, 2025