Illinois Route 101 (IL 101) is a  east–west state road that runs from to the intersection of Illinois Route 61 in Augusta east to U.S. Highway 67 one mile (1.6 km) east of  Littleton.
Illinois Route 101 (IL 101), a state highway running east-west, begins at the intersection with Illinois Route 61 in Augusta and ends at U.S. Highway 67 one mile (1.6 kilometers) east of Littleton.