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2020 American Community Survey 1-Year Experimental Data Products Now Available

2020 American Community Survey 1-Year PUMS with Experimental Weights Are Now Available.

Public Use Microdata Sample (PUMS)

The Census Bureau’s American Community Survey (ACS) Public Use Microdata Sample (PUMS) files enable data users to create custom estimates and tables, free of charge, that are not available through ACS pretabulated data products.  The ACS PUMS files are a set of records from individual people or housing units, with disclosure protection enabled so that individuals or housing units cannot be identified.

The Census Bureau produces ACS 1-year and 5-year PUMS files. These files are accessible using the microdata access tool on data.census.gov and the Census Bureau's FTP site.* Only selected geographic areas are identified in the ACS PUMS, including nation, regions, divisions, states, and Public Use Microdata Areas (PUMAs). Of these, PUMAs are the most detailed geographic areas available.

Check out our handbook, Understanding and Using the ACS PUMS Files, to learn more about working with PUMS files.  Additional user resources are available under “Related Information.”

*Please note that the 2020 ACS 1-year PUMS with Experimental Weights will not be available on data.census.gov. However, previous years are available. See the note below for more information.

2020 ACS 1-Year PUMS with Experimental Weights

The Census Bureau did not release its standard 2020 ACS 1-year Public Use Microdata Sample (PUMS) data because of the impacts of the COVID-19 pandemic. The PUMS data have been released with experimental weights and replicate weights and are available for the nation, regions, divisions, states, and Public Use Microdata Areas (PUMAs). Please visit the link below to be directed to the 2020 ACS 1-year PUMS with Experimental Weights to access the files as well as related technical documentation.

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