Illinois Route 159
IL 159 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT | ||||
| Length | 64.90 mi (104.45 km) | |||
| Existed | 1926–present | |||
| Major junctions | ||||
| South end | IL 3 / IL 154 in Red Bud | |||
| I-64 / US 50 in Fairview Heights I-55 / I-70 / US 40 in Collinsville I-270 in Glen Carbon | ||||
| North end | IL 16 in Royal Lakes | |||
| Location | ||||
| Country | United States | |||
| State | Illinois | |||
| Counties | Randolph, Monroe, St. Clair, Madison, Macoupin | |||
| Highway system | ||||
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Illinois Route 159 is a north–south state route in southwestern Illinois. Its southern terminus is at Illinois Route 3 and Illinois Route 154 in Red Bud and its northern terminus at Illinois Route 16 in Royal Lakes. This is a distance of 64.90 miles (104.45 km).