List of municipalities in Illinois

Illinois is a state located in the Midwestern United States. According to the 2020 United States census Illinois is the 6th most populous state with inhabitants but the 24th largest by land area spanning 55499.0 sqmi of land. Illinois is divided into 102 counties and, as of 2020, contained 1,300 municipalities consisting of cities, towns, and villages.

The most populous city is Chicago with 2,746,388 residents while the least populous is Valley City with 14 residents. The largest municipality by land area is Chicago, which spans 227.73 mi2, while the smallest is Irwin at 0.045 mi2.