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Census and Demographic Data: Microdata

Microdata

Resource Description Format
IPUMS-USA High-precision samples of the American population drawn from federal censuses and the American Community Surveys .ASCII
ICPSR Census data held by ICPSR .ASCII
data.census.gov American Community Survey (ACS) Public Use Microdata Samples (PUMS). See tutorials for accessing microdata. .csv, .sas
Census ftp site PUMS from 1996 to 2015 .csv