The 19th district includes the communities of Bonnie Brae, Country Club Hills, Flossmoor, Frankfort, Frankfort Square, Hazel Crest, Homer Glen, Homewood, Ingalls Park, Joliet, Lemont, Lockport, Lockport Heights, Markham, Marley, Matteson, Mokena, New Lenox, Oak Forest, Olympia Fields, Orland Hills, Orland Park, Park Forest, Richton Park, Tinley Park and University Park.