| Region |
Counties Included |
| 01 |
Adams/Pike |
| 02 |
Alexander/Johnson/Massac/Pulaski/Union |
| 03 |
Bond/Effingham/Fayette |
| 04 |
Boone/Winnebago |
| 05 |
North Suburban Cook |
| 06 |
West Suburban Cook |
| 07 |
South Suburban Cook |
| 08 |
Carroll/JoDaviess/Stephenson |
| 09 |
Champaign/Ford |
| 10 |
Christian/Montgomery |
| 11 |
Clark/Coles/Cumberland/Douglas/Edgar/Moultrie/Shelby |
| 12 |
Clay/Crawford/Jasper/Lawrence/Richland |
| 13 |
Clinton/Marion/Washington |
| 16 |
Dekalb |
| 17 |
DeWitt/Livingston/McLean |
| 19 |
DuPage |
| 20 |
Edwards/Gallatin/Hardin/Pope/Saline/Wabash/Wayne/White |
| 21 |
Franklin/Williamson |
| 22 |
Fulton/Schuyler |
| 24 |
Grundy/Kendall |
| 25 |
Hamilton/Jefferson |
| 26 |
Hancock/McDonough |
| 27 |
Henderson/Mercer/Warren |
| 28 |
Bureau/Henry/Stark |
| 30 |
Jackson/Perry |
| 31 |
Kane |
| 32 |
Iroquois/Kankakee |
| 33 |
Knox |
| 34 |
Lake |
| 35 |
LaSalle |
| 38 |
Logan/Mason/Menard |
| 39 |
Macon/Piatt |
| 40 |
Calhoun/Greene/Jersey/Macoupin |
| 41 |
Madison |
| 43 |
Marshall/Putnam/Woodford |
| 44 |
McHenry |
| 45 |
Monroe/Randolph |
| 46 |
Brown/Cass/Morgan/Scott |
| 47 |
Lee/Ogle |
| 48 |
Peoria |
| 49 |
Rock Island |
| 50 |
St. Clair |
| 51 |
Sangamon |
| 53 |
Tazewell |
| 54 |
Vermilion |
| 55 |
Whiteside |
| 56 |
Will |
