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Name (& Source) County Notes/aka/twp
Ideal1, 2 Carroll .
Idlewild2 Lake .
Idlewood1, 2 Jefferson .
Idylside2 Will .
Iles1, 2 Sangamon .
Illiana1, 2 Edgar historical
Illiana2 Vermilion .
Illiana Heights2 Kankakee .
Illinois City1, 2 Rock Island .
Illinois City3 St. Clair 1823 Gazatteer
Illinois Prairie5 Calhoun .
Illinois Town5 St. Clair .
Illiopolis1, 2 Sangamon .
Imbs1, 2 St. Clair .
Ina2 Jefferson .
Independence3 Bond 1823 Gazatteer
Independence2 Pike .
Indian Creek5 Gallatin .
Indian Creek2 Kane .
Indian Creek2 Lake .
Indian Head Park2 Cook .
Indian Hill2 Cook .
Indian Oaks2 Kankakee .
Indian Prairie5 Wayne .
Indian Spring2 Putnam .
Indianola1, 2, 8 Vermilion formerly known as Dallas then Chillacotha
Industry1, 2 McDonough .
Ingalls Park2 Will .
Ingalton1 DuPage .
Ingleside2 Lake .
Ingleside Shore2 Lake .
Ingraham1, 2 Clay .
Inlet2 Lee .
Inman2 Gallatin .
Inverness2 Cook .
Iola1, 2 Clay .
Iowa Junction1, 2 Henderson .
Ipava1, 2 Fulton .
Irene1, 2 Boone .
Irish GroveU Logan .
Irish Grove5 Sangamon .
Irish Settlement5 Pope .
Irish Settlement5 Randolph .
Iron1, 2 White .
Irondale2 Cook historical
Iroquois1, 2 Iroquois .
Iroquois City5 Iroquois .
Irvin's Settlement5 Hamilton .
Irving1, 2 Montgomery .
Irvington1, 2 Washington .
Irwin1, 2 Kankakee .
Irwins Park2 Sangamon .
Isabel1, 2 Edgar .
Island1 Lawrence .
Island Grove2 Jasper .
Island Grove2 Jasper historical
Island Grove1, 2 Sangamon .
Island Lake2 Lake .
Island View2 Montgomery .
Itasca1, 2 DuPage .
Iuka1, 2 Marion .
Ivanhoe1, 2 Lake .
Ivesdale1, 2, 6 Champaign .
Ivy (Landing)1, 2 Monroe .
Ivy Heights2 Madison .

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