Illinois Route 8 (IL 8) is an east–west state route in central Illinois. It runs east from Illinois Route 97 south of Maquon to the intersection of U.S. Route 24 (McClugage Avenue) and Business U.S. 24 near Washington. Illinois 8 is long. It was truncated in 1965, with some of its segments moving to its modern alignment from Illinois Routes 78 and 116
West Farmington Road from Illinois Route 116 (West Plank Road) through West Peoria to Illinois Route 8 (West Southport Road) was marked as "Spur-IL-8" until 1970. This was a popular route to Bradley University area (West Main Street, North University Drive). Today, the route is marked as Farmington Road and not numbered.