The Census data sources listed below are set up to be used with statistical analysis software (SPSS, Stata, etc.).
American Community Survey Public Use Microdata Sample (PUMS)
Direct download of PUMS data files from the Census Bureau's ftp site. Download files by Region, Division, State, or Public Use Microdata Areas (PUMAs). If you prefer to select variables for download, use IPUMS-USA or MDAT.
CPS Table Creatorgives you the ability to create customized tables from the Current Population Survey's Annual Social and Economic Supplement (March supplement).
Microdata Access Tool(MDAT, beta)
MDAT is the Census Bureau's microdata extraction tool. It allows you to select individual variables to develop customized tables and perform statistical analysis. Datasets included are: American Community Survey and the Current Population Survey.
Census microdata for social and economic research. Includes American Community Survey, Census of Population and Housing, Current Population Survey and American Time Use Survey microdata. Can select variables and customize dataset before downloading. (Minnesota Population Center)