Illinois State Route 120 runs east-west across East-Central Mc Henry County. This runs from the Lake/Mc Henry County Line, near Lakemoor, to U.S. Rt. 14, near Woodstock. IL St Rt 120 passes through the following towns in Mc Henry County. Lakemoor Mc Henry
A guide marker on NB IL St Rt 31/EB IL St Rt 120. A junction marker on NB IL St Rt 31. A junction marker on NB IL St Rt 47. EB IL St Rt 120 near Hutchins St in Woodstock. A junction marker on NB IL St Rt 47. WB IL St Rt 120 west of Woodstock. The western end at U.S. Rt. 14, near Woodstock.
