City of Chicago
City of Chicago site containing facts and figures on Chicago business, housing, employment, health care, weather, and many other topics. For neighborhood data from the 2000 Census, look on this site under Community Areas.
Chicago Community Data Snapshots
The Chicago Metropolitan Agency for Planning (CMAP) is a comprehensive planning organization. Offers snapshots of all 77 Chicago Community Area (as well as metro area municipalities). Each snapshot is presented in an easy-to-print PDF file.