Social Explorer is a detailed reference tool for current and historical Census data from 1790 to the present. Data may be generated by browsing maps or building reports.
Summarizes demographics, housing, employment, transportation habits, retail sales, property values, and land use in metropolitan Chicago's 284 municipalities and 77 Community Areas. Raw data can be downloaded from the CMAP Data Hub.
ICPSR maintains and provides access to a vast archive of social science data for research and includes many large time-series datasets. International in scope.