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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 American Community Survey.

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Code Lists

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

Subject Definitions

Definitions of population and housing variables to help you understand the results of the American Community Survey

Group Quarters Definitions

Definitions for classifying group living situations according to the type of housing and/or services provided

Comparison Guidance

Learn more about comparing the 2009 ACS with Census 2000, 3-year to 3-year, or 5-year to 5-year estimates.

Instructions for Applying Statistical Testing

Basic instructions for obtaining the ACS standard errors needed to do statistical testing

Statistical Testing Tool

Spreadsheet to quickly test whether ACS estimates are statistically different from one another

Page Last Revised - August 18, 2023
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