View the available subjects, detailed codes for variables, changes related to each release, an explanation of sample design, methodology, and accuracy, and files to determine if you are using weights correctly for the American Community Survey Public Use Microdata Sample (PUMS) files. These documents are organized by data year.
Supporting data for the documentation below is available on the Accessing PUMS Data page.
Note that some of these estimates may be different from the estimates for the same characteristics published in data.census.gov. For an explanation of these differences, see the Accuracy of the PUMS above.