3 pages found in
Maps and Views:
University of Illinois at Chicago catalog of recent and historical images and maps.
http://tigger.uic.edu/depts/ahaa/imagebase/index.html
Provides maps based on population and race, ancestry, income and poverty, and education level. Part of the American Cities Atlas Project.
http://130.166.124.2/chipg1.html
A layered map with levels including streets, schools, bike routes, and police districts.
http://www.cityofchicago.org/gis