It runs from IL 23 (State Street) in Marengo to the southern terminus of IL 131 (Green Bay Road) in Lake Bluff.

[1] IL 176 is a two- to four-lane arterial in northern Illinois.

In 1941, the designation was extended westward to Marengo, replacing IL 67, redundant to the newly-designated US 67.

[3] The village of Wauconda hired an engineering firm in 2014 to suggest improvements to the congested interchange with US 12.

The estimated cost to convert the US 12 interchange with IL 176 and the US 12 interchange with IL 59 to at-grade signalized arterial intersections is $300 million, none of which would come from IDOT.