Route information | ||||
---|---|---|---|---|
Maintained by IDOT | ||||
Length | 25.81 mi[1] (41.54 km) | |||
Existed | 1926[2]–present | |||
Major junctions | ||||
West end | IL 3 in Columbia | |||
East end | I-64 / US 50 in O'Fallon | |||
Location | ||||
Country | United States | |||
State | Illinois | |||
Counties | Monroe, St. Clair | |||
Highway system | ||||
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Illinois Route 158 is an east–west state road in southwestern Illinois. Its western terminus is at Illinois Route 3 in Columbia and its eastern terminus is at U.S. Route 50, in O'Fallon. This is a distance of 25.81 miles (41.54 km).[1]