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Learn more about issues impacting the American Community Survey, including design, collection, production, and data release. The notes are sorted by data collection year(s). If the user note pertains to multiple years, the note will appear in the tab for each year.


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Release of Additional 2017-2021 ACS 5-Year SPT and AIANT
January 2024
Classification of the Hmong Population
October 2023
Population Controls for the 2022 ACS
September 2023
Puerto Rico Community Survey Housing Unit Estimate Changes Between 2021 and 2022
September 2023
Item Allocation Rate for Total Income
September 2023
Home Value Estimates in Current Dollars
September 2023
Change to County-Equivalents in the State of Connecticut for 2022 ACS
September 2023
Suppression of 2022 ACS 1-Year Comparison Profiles for CDs, PUMAs, & UA
September 2023
Discontinuation of ACS 5-Year Comparison Profiles for Cong Districts
September 2023
Modification to Calculations of Inflation-Adjusted Dollar-Based Medians in Comparison Profiles
September 2022
Potential Misreporting of Public Assistance in 2021 ACS
September 2022
Data
Changes to Format of the ACS Summary File
September 2022
Population Controls for the 2021 ACS
August 2022
2019 ACS 1-Year PUMS with Experimental Weights
June 2022
Modifications to the Entropy Balance Weighting for the 2016-2020 ACS 5-Year Release
May 2022
Increased Margins of Error in the 5-Year Estimates Containing Data Collected in 2020
March 2022
Modification to Calculation of "Children of the Householder"
March 2022
Changes to the Alphabetical Index of Occupations
March 2022
Modifications to the 5-Year Estimation Methodology Containing Data Collected in 2020
March 2022
Use of Auxiliary Data to Predict Housing Unit Status and Improve the Quality of ACS Data Impacted by the Pandemic
November 2021
Improvements to the Race Question
November 2021
Improvements to the Hispanic Origin Question
November 2021
Changes to Mortgage Status
November 2021
Changes to Housing Cost Estimates
November 2021
Use of Data from the Bureau of Prisons in the 2020 American Community Survey
November 2021
Changes for 2020 ACS 1-Year Estimates
July 2021
Population Controls for the 2020 ACS
March 2021
Changes in the Educational Instruction Occupations Estimates
September 2020
Discontinuation of Tables B00001, B00002, K200001, and K200002
September 2020
Change to VA Health Care Question
September 2020
Changes to the Means of Transportation Question
September 2020
Changes to the Telephone Service Question
September 2020
Changes to the Retirement Income Question
September 2020
New Content on Subsidized Marketplace Coverage
September 2020
Changes to the Relationship to Householder Question
September 2020
Changes in the Active Duty Estimates
September 2020

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Page Last Revised - August 24, 2023
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