The 39th Legislative District includes the communities of Addison, Bensenville, Chicago, Des Plaines, Elk Grove Village, Elmhurst, Elmwood Park, Forest Park, Franklin Park, Maywood, Melrose Park, Northlake, Oak Park, River Forest, River Grove, Rosemont, Schiller Park, Stone Park and Wood Dale..

The 39th Legislative District includes both the 77th and 78th House Districts. The 77th House District is represented by Rep. Norma Hernandez (D - Melrose Park). The 78th House District is represented by Rep. Camille Lilly (D - Chicago).