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Explore data on data.census.gov View all data resources
Census Academy Combining Data Data Equity Tools Data Tools and Apps Datasets Developers Experimental Data Products Interactive Maps Mapping Files Profiles Related Sites Software Tables Training and Workshops Visualizations
Survey Help View all Surveys & Programs
2020 Census 2030 Census American Community Survey (ACS) American Housing Survey (AHS) Annual Integrated Economic Survey (AIES) Business Trends and Outlook Survey (BTOS) Census of Governments County Business Patterns (CBP) Current Population Survey (CPS) Economic Census Household Pulse Survey International Programs Metro and Micro Areas Population Estimates Population Projections Small Area Income and Poverty Statistics of U.S. Businesses Survey of Income and Program Participation (SIPP)
View all library resources Glossary
America Counts: Stories Audio Blogs By the Numbers Facts for Features Fact Sheets Infographics and Visualizations Photos Publications Spotlights Stats for Stories Training (Census Academy) Videos Working Papers

Research & Methodology

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Within American Community Survey (ACS)

Research & Methodology

The American Community Survey (ACS) is the only source of comparable, quality information about the people in all our communities.  Learn more about recent research efforts, the process to add or modify questions on the survey, the basic design and methodology used in the ACS, an archive of ACS questionnaires and instruction guides, as well as quality measures used to monitor the accuracy and reliability of ACS data.

Agility in Action
Find more information about the numerous activities to build and maintain customer support and awareness of, and trust in the American Community Survey.
Archived Projects
Discover materials related to archived American Community Survey research and methodology projects.
Content Changes
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
December 12, 2022
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.
Questionnaire Archive
Browse sample American Community Survey questionnaires in English and Spanish with instruction guides - 1996 through present.
Working Paper
ACS Research & Evaluation Program
Read papers related to American Community Survey research & evaluation projects, including survey methodology research, important for improving 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.

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Page Last Revised - August 11, 2023
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