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PUMS Data

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Within Microdata

PUMS Data

The American Community Survey (ACS) Public Use Microdata Sample (PUMS) files are a set of untabulated records about individual people or housing units. Supporting documentation for the data below is available on the PUMS Documentation page. To learn more, visit our PUMS Handbook.

PUMS files are available on the File Transfer Protocol (FTP) site in both CSV and SAS formats. Both formats contain two record types including housing files (e.g. "csv_hak" or "sas_hak") or person files (e.g. "csv_pak" or "sas_pak").  Microdata access from 2005-current is available on data.census.gov.

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2020

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. Here you can access the files as well as related technical documentation. The experimental PUMS files will not be released on data.census.gov.

Data
2020 ACS 1-Year Public Use Microdata Sample with Experimental Weights
Access data and documentation for the 2020 ACS 1-year Public Use Microdata Sample (PUMS) with Experimental Weights.

2016-2020 ACS 5-year PUMS

The Census Bureau released the 2016-2020 ACS 5-year PUMS files as part of its standard release for the ACS 5-year products after determining the resulting data were fit for public release.

Access on FTP site

ftp 2020 ACS 5-Year PUMS

Access on data.census.gov

web 2020 ACS 5-Year PUMS

Access through API

ACS 5-Year PUMS

For PUMS documentation by year visit our PUMS Documentation page and select the specific year of interest.

Page Last Revised - May 14, 2024
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