District 1
Representing Boone, Cook, DeKalb, DuPage, Kane, Kendall, Lake, McHenry, Will Counties
District 2
Representing Carroll, Jo Daviess, Ogle, Stephenson, Winnebago Counties
District 3
Representing Henderson, Henry, Knox, Mercer, Rock Island, Warren Counties
District 4
Representing Bureau, Lee, Marshall, Putnam, Stark, Whiteside Counties
District 7
Representing Dewitt, Macon, McLean, Moultrie, Piatt, Woodford Counties
District 8
Representing Cass, Fulton, Logan, Mason, Menard, Peoria, Tazewell Counties
District 9
Representing Adams, Brown, Hancock, McDonough, Pike, Schuyler Counties
District 10
Representing Calhoun, Greene, Jersey, Macoupin, Morgan, Sangamon, Scott Counties
District 11
Representing Christian, Effingham, Fayette, Montgomery, Shelby Counties
District 12
Representing Clark, Coles, Cumberland, Crawford, Douglas, Edgar, Jasper Counties
District 13
Representing Clay, Edwards, Jefferson, Lawrence, Marion, Richland, Wabash, Wayne, White Counties
District 14
Representing Bond, Clinton, Madison, Monroe, St. Clair, Washington Counties
District 15
Representing Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson, Johnson, Massac, Perry, Pope, Pulaski, Randolph, Saline, Williamson, Union Counties