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
NB IL St Rt 47 north of Algonquin Road. NB IL St Rt 47 north of Huntley. NB IL St Rt 47/WB IL St Rt 176 north of east IL St Rt 176. A Mc Henry County mile marker. NB IL St Rt 47 at U.S. Rt. 14. A junction marker on WB U.S. Rt. 14. NB IL St Rt 47 north of IL St Rt 120. NB IL St Rt 47 north of Woodstock. NB IL St Rt 47 at Harrison in Hebron. End signage on IL St Rt 47 at the Wisconsin/Illinois State Line. Signs at the Illinois State Line. The northern end of IL St Rt 47 at the Illinois/Wisconsin State Line. The northern end marker. SB IL St Rt 47 at the Illinois/Wisconsin State Line.
