2011 Redistricting
The district covers parts of Cook and Will counties, as of the 2011 redistricting which followed the 2010 census. All or parts of Alsip, Blue Island, Chicago, Crestwood, Frankfort, Midlothian, Mokena, Oak Forest, Orland Park and Tinley Park are included. The representatives for these districts will be elected in the 2012 primary and general elections, and the boundaries will become effective on January 3, 2013.
Read more about this topic: Illinois's 1st Congressional District