- Available from the City of Chicago GIS homepage:
Census Block
Census Data (September 2004)
Census Tract
Central Business District (July 2004)
City Boundary
Community Areas
Illinois House
Illinois Senate
Surrounding Municipalities
Neighborhoods
Precincts
US Congress
Ward (September 2004)
Zipcode (2000 Census)

- Additional tax incentive area data available from the City of Chicago GIS homepage:
Conservation Areas (July 2004)
Empowerment Zones (July 2004)
Enterprise Communities (December 2005)
Enterprise Zones (July 2004)
Industrial Corridors (April 2006)
Planning Districts (December 2005)
Planning Regions (March 2005)

- Additional transportation data available from the City of Chicago GIS homepage:
Bike Routes
CTA Lines
CTA Stations
Chicago Street Names (May 2007)
Major Streets (2007)
Metra Trains
Railroads
Transportation (2007)

- Additional points of interest available from the City of Chicago GIS homepage:
Cemeteries
Forests (July 2004)
Libraries (March 2006)
Park (January 2007)
Pedestrian Walkways
School Grounds (2007)

- Available from the CLEAR GIS website:
Community Areas
Police Beats
Police Districts
Police Stations