Chicago related general statistics and data sites.
Time Series Data for Chicago, 1840-1973
Numeric dataset from Prof Skogan (NU PoliSci)'s book, Chicago since 1840 : a time-series data handbook (also available in print - call number: L 317.7311 S628), includes a variety of historical social, economic and political data for Chicago (mostly at city level.)
Data Portal : City of Chicago
Find a variety of data from the City of Chicago official site.
Chicago Tribune: Data Center
Maps, applications and databases from Chicago Tribune! "The Tribune's commitment to watchdog reporting includes online resources you can use to learn more about our investigative work and how it affects you, as well as to find information yourself.
If you need municipality-level historical statistics for Chicago (or any cities), try: