Illinois Route 131
| Green Bay Road | ||||
IL 131 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT | ||||
| Length | 15.15 mi (24.38 km) | |||
| Existed | 1938–present | |||
| Major junctions | ||||
| South end | IL 176 in Lake Bluff | |||
| North end | WIS 31 / CR A1 in Winthrop Harbor | |||
| Location | ||||
| Country | United States | |||
| State | Illinois | |||
| Counties | Lake | |||
| Highway system | ||||
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Illinois Route 131 (IL 131) is a north–south state route in northeastern Illinois. It extends south from Wisconsin Highway 31 and Lake CR A1/19 (128th Street) at the Illinois/Wisconsin state line by Pleasant Prairie, south to Illinois Route 176 in Lake Bluff, a distance of 15.15 miles (24.38 km).