I Cities in Illinois

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17 Illinois cities and towns start with I, from Illiopolis to Ivesdale. The largest is Itasca, with an estimated 9,506 people in July 2024, per the US Census Bureau.

Illiopolis Ina Indian Creek Indian Head Park Indianola Industry Inverness Iola Ipava Iroquois Irving Irvington Irwin Island Lake Itasca Iuka Ivesdale