Counties, Regions & Areas
COUNTY → REGION
Adams: 1
Alexander: 30
Bond: 3
Boone: 4
Brown: 1
Bureau: 28
Calhoun: 40
Carroll: 8
Cass: 1
Champaign: 9
Christian: 3
Clark: 11
Clay: 12
Clinton: 13
Coles: 11
Cook (City of Chicago): 1-A
Cook (West): 1-B-B
Cook (South): 1-B-C
Cook (North): 1-B-D
Crawford: 12
Cumberland: 11
DeKalb: 16
DeWitt: 17
Douglas: 11
DuPage: 19
Edgar: 11
Edwards: 20
Effingham: 3
Fayette: 3
Ford: 9
Franklin: 21
Fulton: 26
Gallatin: 20
Greene: 40
Grundy: 24
Hamilton: 20
Hancock: 26
Hardin: 20
Henderson: 33
Henry: 28
Iroquois: 32
Jackson: 30
Jasper: 12
Jefferson: 13
Jersey: 40
Jo Daviess: 8
Johnson: 21
Kane: 31
Kankakee: 32
Kendall: 24
Knox: 33
Lake: 34
LaSalle: 35
Lawrence: 12
Lee: 47
Livingston: 17
Logan: 17
Macon: 39
Macoupin: 40
Madison: 41
Marion: 13
Marshall: 35
Mason: 53
Massac: 21
McDonough: 26
McHenry: 44
McLean: 17
Menard: 51
Mercer: 33
Monroe: 45
Montgomery: 3
Morgan: 1
Moultrie: 11
Ogle: 47
Peoria: 48
Perry: 30
Piatt: 39
Pike: 1
Pope: 20
Pulaski: 30
Putnam: 35
Randolph: 45
Richland: 12
Rock Island: 49
Saline: 20
Sangamon: 51
Schuyler: 26
Scott: 1
Shelby: 11
St. Clair: 50
Stark: 28
Stephenson: 8
Tazewell: 53
Union: 30
Vermilion: 54
Wabash: 20
Warren: 33
Washington: 13
Wayne: 20
White: 20
Whiteside: 47
Will: 56
Williamson: 21
Winnebago: 4
Woodford: 53
REGION → COUNTIES
1: Adams, Brown, Cass, Morgan, Pike, Scott
1-A: Cook (City of Chicago)
1-B-B: Cook (West)
1-B-C: Cook (South)
1-B-D: Cook (North)
3: Bond, Christian, Effingham, Fayette, Montgomery
4: Boone, Winnebago
8: Carroll, Jo Daviess, Stephenson
9: Champaign, Ford
11: Clark, Coles, Cumberland, Douglas, Edgar, Moultrie, Shelby
12: Clay, Crawford, Jasper, Lawrence, Richland
13: Clinton, Jefferson, Marion, Washington
16: DeKalb
17: DeWitt, Livingston, Logan, McLean
19: DuPage
20: Edwards, Gallatin, Hamilton, Hardin, Pope, Saline, Wabash, Wayne, White
21: Franklin, Johnson, Massac, Williamson
24: Grundy, Kendall
26: Fulton, Hancock, McDonough, Schuyler
28: Bureau, Henry, Stark
30: Alexander, Jackson, Perry, Pulaski, Union
31: Kane
32: Iroquois, Kankakee
33: Henderson, Knox, Mercer, Warren
34: Lake
35: LaSalle, Marshall, Putnam
39: Macon, Piatt
40: Calhoun, Greene, Jersey, Macoupin
41: Madison
44: McHenry
45: Monroe, Randolph
47: Lee, Ogle, Whiteside
48: Peoria
49: Rock Island
50: St. Clair
51: Menard, Sangamon
53: Mason, Tazewell, Woodford
54: Vermilion
56: Will
COOK COUNTY DETAILS
Cook (City of Chicago) - 1-A
Cook (North) - 1-B-D
Arlington Heights, Buffalo Grove, Des Plaines, Elk Grove Village, Evanston, Glencoe, Glenview, Hanover Park, Hoffman Estates, Kenilworth, Lincolnwood, Morton Grove, Niles, Northbrook, Northfield, Palatine, Park Ridge, Prospect Heights, Rolling Meadows, Roselle, Schaumburg, Skokie, South Barrington, Wheeling, Wilmette, Winnetka
Cook (South) - 1-B-C
Alsip, Bedford Park, Blue Island, Bridgeview, Burbank, Burnham, Calumet City, Calumet Park, Chicago Heights, Chicago Ridge, Country Club Hills, Crestwood, Dixmoor, Dolton, Evergreen Park, Flossmoor, Ford Heights, Glenwood, Harvey, Hazel Crest, Hickory Hills, Hometown, Homewood, Justice, Lansing, Lemont, Lynwood, Markham, Matteson, Merrionette Park, Midlothian, Oak Forest, Oak Lawn, Orland Park, Palos Heights, Palos Hills, Park Forest, Phoenix, Posen, Richton Park, Riverdale, Robbins, Sauk Village, South Chicago Heights, South Holland, Steger, Streamwood, Summit, Thornton, Tinley Park, Willow Springs, Worth
Cook (West) - 1-B-B
Bellwood, Berkeley, Berwyn, Broadview, Brookfield, Burr Ridge, Cicero, Countryside, Elmwood, Forest Park, Franklin Park, Harwood Heights, Hillside, Hines, Hodgkins, La Grange, La Grange Highlands, La Grange Park, Lyons, Maywood, McCook, Melrose Park, Norridge, North Riverside, Northlake, Oak Park, River Forest, River Grove, Riverside, Rosemont, Schiller Park, Stickney, Stone Park, Westchester, Western Springs