Methodology

Skip Navigation

American Community Survey (ACS)

Back to American Community Survey (ACS)

About the ACS

Respond to the ACS

News & Updates

Data

Microdata

Guidance for Data Users

Geography & ACS

Technical Documentation

Methodology

Library

Operations and Administration

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.

Design and Methodology Report

Learn more about the basic American Community Survey design and methodology through 2013, including the internet response mode.

Sample Size and Data Quality

Explore quality measures for the American Community Survey, including sample size, response rates, coverage rates, and item allocation rates.

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.

Questionnaire Archive

Browse sample American Community Survey questionnaires in English and Spanish with instruction guides - 1996 through present.

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.

Related Information

Agility in Action

WORKING PAPER

ACS Research & Evaluation Program

WORKING PAPER

Content Test Evaluation Reports