American Community Survey (ACS)

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

  2017 Code List   [1.0 MB]

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

  2017 Subject Definitions   [1.4 MB]

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

  2017 Group Quarters Definitions   [<1.0 MB]

Learn more about comparing the 2017 ACS with Census 2000, 2010 Census, and 5-year to 5-year estimates.

  2017 Comparison Guidance  

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

  2013-2017 Instructions for Applying Statistical Testing to ACS 5-year Data   [<1.0 MB]

  2017 Instructions for Applying Statistical Testing to ACS 1-year Data   [<1.0 MB]

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

  Statistical Testing Tool  

A basic explanation of the sample design, estimation methodology, and accuracy of the data.

  2017 ACS 1-year Accuracy of the Data (US)   [<1.0 MB]

  2017 PRCS 1-year Accuracy of the Data (Puerto Rico)   [<1.0 MB]

  2013-2017 ACS Multiyear Accuracy (US)   [<1.0 MB]

  2013-2017 PRCS Multiyear Accuracy (Puerto Rico)   [<1.0 MB]