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Topics
Data & Maps
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Resource Library
Methodology
The American Community Survey (ACS) is the only source of comparable, quality information about the people in all our communities. Learn more about the basic design and methodology used in the ACS, quality measures used to monitor the accuracy and reliability of ACS data, the process to add or modify questions on the survey, an archive of ACS questionnaires and instruction guides, as well as research related to what would happen if the ACS was not mandated by law.
Content Test
Learn more about the process used to determine the best wording, format, and placement of proposed new or modified questions on the American Community Survey.
Design and Methodology Report
Learn more about the basic American Community Survey design and methodology through 2019.
Disclosure Avoidance
Visit this page for updates as we research the best long-term strategy for protecting American Community Survey respondents given emerging digital-age threats.
Mandatory vs. Voluntary Methods
Discover what would happen if the ACS was not mandatory, such as reduced response rates, increased sample, more follow-up, and additional cost.
Questionnaire Archive
Browse sample American Community Survey questionnaires in English and Spanish with instruction guides - 1996 through present.
Sample Size and Data Quality
Explore quality measures for the American Community Survey, including sample size, response rates, coverage rates, and item allocation rates.
Page Last Revised - April 19, 2023
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