Kankakee (kăngkəkēˈ) [key], city (1990 pop. 27,575), seat of Kankakee co., E Ill., on the Kankakee River; inc. 1855. It is a trade, processing, and shipping center for a rich agricultural region producing corn, soybeans, and dairy cattle. Kankakee's varied manufactures include wire, vinyl tiles, consumer goods, chemicals, pet foods, polymers, and industrial metals. Limestone quarries are nearby. Olivet Nazarene College is in the city.