Illinois State Route 176 runs east-west across Southern Mc Henry County. This runs from the Lake/Mc Henry County Line, at Island Lake, to Illinois State Route 23, at Marengo. IL St Rt 176 passes through the following towns in Mc Henry County. Island Lake Burtons Bridge Praire Grove Crystal Lake Marengo IL St Rt 176 is multi-plexed in Mc Henry County. Illinois State Route 47, near Woodstock.
IL St Rt 176 intersects the following highways in Mc Henry County. Illinois State Route 31, at Crystal Lake.
A junction marker on NB IL St Rt 31. WB IL St Rt 176 in Crystal Lake. WB IL St Rt 176 near U.S. Rt. 14. A Mc Henry County mile marker. WB IL St Rt 176 near Marengo. The western end of IL St Rt 176 in Marengo. The western end marker.
