View the detailed codes and definitions for variables, statistical testing, and an explanation of sample design, methodology, and accuracy for the American Community Survey.
Definitions of population and housing variables to help you understand the results of the American Community Survey
Definitions for classifying group living situations according to the type of housing and/or services provided
Learn more about comparing the 2007 ACS 1-Year and 2005-2007 ACS 3-Year with Census 2000, and the 2007 ACS 1-Year with 2006 ACS 1-Year.
Basic instructions for obtaining the ACS standard errors needed to do statistical testing
Spreadsheet to quickly test whether ACS estimates are statistically different from one another
A basic explanation of the sample design, estimation methodology, and accuracy of the data