Mc Henry County is the northern most county Illinois State Route 47 runs through. Entering the State of Illinois, and County of Mc Henry from Wisconsin State Route 120 and heading due south to Kane County at Huntley. IL St Rt. 47 passes through the following towns in Mc Henry County. Huntley Woodstock
A Mc Henry County mile marker. A junction marker on WB U.S. Rt. 14. End signage on IL St Rt 47 at the Wisconsin/Illinois State Line. Signs at the Illinois State Line.
