Kankakee is a city in and the county seat of Kankakee County, Illinois, United States. Located on the Kankakee River, as of 2020, the city's population was 24,052. Kankakee is a principal city of the Kankakee-Bourbonnais-Bradley Metropolitan Statistical Area. It serves as an anchor city in the rural plains outside Chicago.

Kankakee County is a county located in the U.S. state of Illinois. According to the 2020 census, it has a population of 107,502. Its county seat is Kankakee. Kankakee County comprises the Kankakee, IL Metropolitan Statistical Area.