Illinois Route 114 is a rural east–west road that connects State Road 10 in Indiana, USA, with Illinois Route 1 and Illinois Route 17 (Dixie Highway), which overlap in Momence. This is a distance of 7.40 miles (11.91 km).

Illinois 114 follows the southern bank of the Kankakee River for its entire length, and is the access road for the small camps on the Kankakee River east of Momence. It is a two-lane, undivided surface road.

SBI Route 114 was established in 1924. Its routing has not changed since it was initially designated.