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PUMS Documentation

View the available subjects, detailed codes for variables, changes related to each release, an explanation of sample design, methodology, and accuracy, and files to determine if you are using weights correctly for the American Community Survey Public Use Microdata Sample (PUMS) files. These documents are organized by data year.

Supporting data for the documentation below is available on the Accessing PUMS Data page.

  • 2022
  • 2021
  • 2020
  • 2019
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013
  • 2012
  • 2011
  • 2010
  • 2009
  • 2008
  • 2007
  • 2006
  • 2005

PUMS Variable Changes and Explanations

Important information about 2022 geography and variable changes.

Subjects in the PUMS

A list of topics included in each of the housing and population record files.

PUMS Code Lists

Detailed codes for variables that contain a large number of coded responses, such as ancestry and occupation.

PUMS Top Coded and Bottom Coded Values

List of variables with responses exceeding a state-specific value that are replaced with a predetermined value.

PUMS Estimates for User Verification

Note that some of these estimates may be different from the estimates for the same characteristics published in data.census.gov. For an explanation of these differences, see the Accuracy of the PUMS above.

PUMS Record Counts

Counts of unweighted records for each PUMS file.

Page Last Revised - March 13, 2024
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