U.S. flag

An official website of the United States government

Skip Header

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.

  • 2022
  • 2021
  • 2020
  • 2019
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013
  • 2012
  • 2011
  • 2010
  • 2009
  • 2008
  • 2007
  • 2006
  • 2005

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 2018 ACS with Census 2000, 2010 Census, and 5-year to 5-year estimates.

Table Shells and Table List

Learn more about the layout of the tables and information about tables.

Instructions for Applying Statistical Testing

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

Worked Examples for Approximating Margins of Error

Worked Examples on approximating standard errors for various types of ACS estimates.

Statistical Testing Tool

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

Page Last Revised - August 18, 2023
Is this page helpful?
Thumbs Up Image Yes Thumbs Down Image No
255 characters maximum 255 characters maximum reached
Thank you for your feedback.
Comments or suggestions?


Back to Header