View the detailed codes and definitions for variables, statistical testing, and an explanation of sample design, methodology, and accuracy for the American Community Survey.
Detailed codes for variables that contain a large number of coded responses, such as ancestry and occupation.
Basic instructions for obtaining the ACS standard errors needed to do manual statistical testing.
Definitions of population and housing variables to help you understand the results of the American Community Survey
Worked Examples on approximating standard errors for various types of ACS estimates.
Definitions for classifying group living situations according to the type of housing and/or services provided
Spreadsheet to quickly test whether ACS estimates are statistically different from one another.
Learn more about comparing the 2021 ACS with 2020 Census, 2010 Census, and 5-year to 5-year estimates.
A basic explanation of the sample design, estimation methodology, and accuracy of the data.
Learn more about the layout of the tables and information about tables.