The 15th District includes all, or parts, of Beecher, Bradley, Burnham, Calumet City, Chicago, Chicago Heights, Crete, Dixmoor, Dolton, East Hazel Crest, Flossmoor, Ford Heights, Glenwood, Goodenow, Harvey, Hazel Crest, Homewood, Manteno, Markham, Midlothian, Oak Forest, Olympia Fields, Peotone, Phoenix, Posen, Sauk Village, South Chicago Heights, South Holland, Steger, Thornton and Tinley Park.