Census Data Resources: Understanding the Data

Guide to (mostly online) resources for manipulating and extracting Census data.

About the Surveys

The American Community Survey (ACS) replaced the decennial long form beginning in 2005.  While the subjects are very similar between the ACS and the decennial long form, the survey methodology is substantially different.  Variables, even with the same name, may not be comparable between the two surveys.

Read more about the American Community Survey.

Read more about the Decennial Census.

Maki images courtesy of Mapbox

Questions Asked and Subjects Included in the Decennial Censuses and the ACS

Documentation

ACS Documentation

Decennial Documentation