Illinois Route 113 (IL 113) is a two-lane state route that runs east from IL 47 north of Mazon and east of Seneca to IL 17 in western Kankakee, just across the Kankakee River from U.S. Route 45 (US 45) and US 52. Past this junction, Route 113 enters Kankakee County. The road continues to follow the river into Kankakee, where it terminates at Route 17.
History
SBI Route 113 was the name of both roads on the north and south sides of the Kankakee River from Diamond (between Coal City and Braidwood on Interstate 55) to Kankakee. In 1940, the route became Illinois Route 113N and Illinois Route 113S, with 113N as the northern route and 113S as the southern, with 113S used as the western end to U.S. Route 66 (now Interstate 55). In 1961, Illinois 113S became Illinois Route 113, and 113N was redesignated Illinois Route 102.