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United States Census Bureau | An official website of the United States Government Understanding and Using the American Community Survey Public Use Microdata Sample Files: What Data Users Need to Know February 2021 The U.S. Census Bureau produces a large number of data profiles, tables, maps, and other products based on American Community Survey (ACS) data. Even this abundance of pretabulated estimates and data products cannot meet the needs of every data user. The Census Bureau’s ACS Public Use Microdata Sample (PUMS) files enable data users to create custom estimates and tables, free of charge, that are not available through pretabulated ACS data products. This guide provides an overview of the ACS PUMS files and how they can be used to access data about America’s communities. Download by Section [/conte nt/da m/Cen sus/lib rary/pu blicatio ns/202 1/acs/ acs_pu ms_ha ndboo k_2021 .pdf] Underst anding and Using the America n Commu nity Survey Public Use Microda ta Sample Files [4.7 MB] Report 1. ACS PUMS Files: The Basics [<1.0 MB] [/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_ch01.pdf] American Community Survey 2. Public Use Microdata Areas [<1.0 MB] [/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_ch02.pdf] American Community Survey 3. Accessing ACS PUMS Data [<1.0 MB] [/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_ch03.pdf] American Community Survey 4. Preparing ACS PUMS Data Files for Analysis [<1.0 MB] [/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_ch0 4.pdf] American Community Survey 5. Data Quality in the ACS PUMS [<1.0 MB] [/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_ch05.pdf] American Community Survey 6. Additional Resources [<1.0 MB][/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_ch06.pdf] American Community Survey Appendix A: Linking Household Members Together [<1.0 MB] [/content/dam/Census/library/publications/2021/acs/acs_pums_handbook_2021_app endix_a.pdf] American Community Survey Others in Series Publication What State and Local Government Users Need to Know August 2020 This handbook helps data users from state and local governments learn about ACS data and provides examples of how ACS data can answer real-world questions. [/programs-surveys/acs/guidance/handbooks/state-local.html] Publication Geography and the American Community Survey February 2020 This guide provides an overview of geographic areas for which ACS data are available, special considerations in working with spatial data, and more. [/programs-surveys/acs/library/handbooks/geography.html] Publication What Congress Needs to Know June 2020 This handbook helps congressional staff use ACS data to respond to constituent inquiries, draft floor/press statements, conduct legislative research, and more. [/programs-surveys/acs/guidance/handbooks/congress.html] VIEW ALL [/PROGRAMS-SURVEYS/ACS/LIBRARY/HANDBOOKS.HTML] Related Information PUMS Data [/programs-surveys/acs/microdata/access.html] PUMS Documentation [/programs-surveys/acs/microdata/documentation.html] WEBINAR Introduction to the American Community Survey Public Use Microdata Sample (PUMS) Files [/data/academy/webinars/2020/introduction-to-american-community-survey-public-use-microdata-sample-pums-files.html] Page Last Revised - October 7, 2024