City of Chicago Data Portal
The City of Chicago's Data Portal provides access to over 200 datasets about City departments, services, facilities and performance. Users can create maps directly on the website or export the data into .csv and other formats for analysis on other platforms. Categories of data include public safety, community & economic development, and transportation.
Data for Cook County are available here>>
Data for the state of Illinois are available here>>
To search for all city-, county-, and state-level data on a single interface, please visit www.metrochicagodata.org>>