PUMS Data
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.
2022
Access on the FTP site
Access on data.census.gov
Access through API
2018-2022 ACS 5-Year PUMS PUMA Update File
Video Tutorials
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VideoDual Vintage PUMAs in the ACS 5-Year PUMSIn this tutorial we’ll help you understand the concept of Dual Vintage PUMAs in the ACS 5-Year PUMS.
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VideoUsing Dual Vintage PUMAs in the Microdata Access ToolIn this companion video tutorial, we'll walk you through the process for getting data for Dual Vintage PUMAs using the 2022 ACS 5-Year PUMS in MDAT.
For PUMS documentation by year visit our PUMS Documentation page and select the specific year of interest.
Page Last Revised - February 4, 2026