Current Population Survey microdata including basic monthly surveys and supplements from 1962 to the present.
Census microdata covering 82 countries from 1960 to the present. IPUMS NAPP offers microdata from the 19th and early 20th centuries.
Demographic and Health Surveys integrated for analysis across time and space from 1980 to the present.
IPUMS USA users can now access the Census editing procedures for the American Community Survey on the IPUMS website. This feature allows IPUMS users to understand how the Census edits responses in order to provide more accurate data. (Read More)