Illinois Route 129
| Washington Street | ||||
IL 129 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT | ||||
| Length | 4.06 mi (6.53 km) | |||
| Existed | 1960–present | |||
| Major junctions | ||||
| South end | IL 113 in Braidwood | |||
| North end | I-55 in Braidwood | |||
| Location | ||||
| Country | United States | |||
| State | Illinois | |||
| Counties | Will | |||
| Highway system | ||||
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Illinois Route 129 (IL 129) is a 4.06-mile-long (6.53 km) north–south state route in northeastern Illinois. It runs from IL 113 in downtown Braidwood north to Interstate 55 (I-55).