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The American Community Survey provides various documentation to assist users with our data releases. Click on the links below to learn more about these resources.
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.
User Notes
Learn more about issues impacting the American Community Survey, including design, collection, production, and data release.
Errata Notes
Learn more about errors and/or corrections related to the American Community Survey.
October 01, 2016
Data Suppression
Learn more about why certain American Community Survey estimates are not available due to data suppression.
Table & Geography Changes
Learn more about changes to tables and geography for each American Community Survey data release.
Table Shells and Table List
View the layout of American Community Survey tables without the estimates or margins of error filled in.
Summary File Documentation
View technical documentation and user tools available for the American Community Survey Summary File.
PUMS Documentation
Learn more about how to work with the American Community Survey Public Use Microdata Sample (PUMS) files.
Variance Replicate Tables Documentation
View documentation available for the American Community Survey variance replicate tables.
Race/Ethnicity and American Indian & Alaska Native Documentation
View documentation for the American Community Survey Selected Population Tables and American Indian and Alaska Native Tables.
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