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2020 ACS 1-Year Public Use Microdata Sample with Experimental Weights

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2020 ACS 1-Year Public Use Microdata Sample with Experimental Weights

Visit the File Transfer Protocol (FTP) site linked below to access the tables for the 2020 ACS 1-year PUMS with Experimental Weights. The 2020 ACS 1-year PUMS with Experimental Weights files are available for the nation, regions, divisions, states, and Public Use Microdata Areas (PUMAs). Technical Documentation for this release is located under PUMS Technical Documentation below. You can also browse the pages under Explore More for additional information.

2020 ACS 1-Year PUMS with Experimental Weights on FTP

PUMS ReadMe

Guidance for novice ACS PUMS files users.

pdf 2020 ACS 1-year PUMS ReadMe

PUMS Variable Changes and Explanations

Important information about 2020 geography and variable changes.

pdf 2020 ACS 1-year PUMS Variable Changes and Explanations

Subjects in the PUMS

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

pdf 2020 ACS 1-year PUMS Subjects

PUMS Data Dictionary

Includes variables available for each PUMS release and how each variable is coded.

pdf 2020 ACS 1-year PUMS Data Dictionary [PDF]
txt 2020 ACS 1-year PUMS Data Dictionary [TXT]
xls 2020 ACS 1-year PUMS Data Dictionary [CSV]

Code Lists

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

xls 2020 ACS 1-year PUMS Code Lists

PUMS Top Coded and Bottom Coded Values

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

pdf 2020 ACS PUMS Top & Bottom Coded Variables [PDF]
xls 2020 ACS PUMS Top & Bottom Coded Values [CSV]

Accuracy of the PUMS

A basic explanation of the sample design, estimation methodology, and accuracy of the data.

pdf 2020 ACS 1-year PUMS Accuracy

PUMS Estimates for User Verification

Examples of PUMS estimates with their standard error and margin of error.

ftp 2020 ACS 1-year PUMS estimates [SAS]
xls 2020 ACS 1-year PUMS estimates [CSV]

PUMS Record Counts

Counts of unweighted records for each PUMS file.

xls 2020 ACS 1-year PUMS record counts

Explore More

American Community Survey Microdata
Explore how to work with the American Community Survey Public Use Microdata Sample (PUMS) files to create custom estimates and tables.
Code Lists, Definitions, and Accuracy
View the detailed codes and definitions for variables, statistical testing, and an explanation of sample design, methodology, and accuracy for the ACS.
Sample Size and Data Quality
Explore quality measures for the American Community Survey, including sample size, response rates, coverage rates, and item allocation rates.
2019 ACS 1-Year PUMS with Experimental Weights
June 2022
Page Last Revised - May 27, 2022
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