Illinois Route 158
IL 158 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT | ||||
| Length | 25.81 mi (41.54 km) | |||
| Existed | 1926–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).