2021 ACS PUMS Estimates
PUMS User Guide
Guidance for novice ACS PUMS files users.
PUMS Variable Changes and Explanations
Important information about 2021 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.
Data Dictionaries for PUMS Files
Includes variables available for each release of PUMS files on the Census Bureau FTP site, and how each variable is coded.
Microdata API Data Dictionaries
Includes variables available on the Microdata API, including microdata access on data.census.gov (MDAT).
Accuracy of the PUMS
A basic explanation of the sample design, estimation methodology, and accuracy of the data.
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.