Illinois State Route 163 is a north-south highway in St. Clair County. This runs from Illinois State Route 15 at Alorton to Illinois State Route 158 at Millstadt. IL St Rt 163 passes through the following towns in St. Clair County. Alorton
The western end at IL St Rt 15. The western end marker. A St. Clair County mile marker. A junction marker on WB IL St Rt 13/SB IL St Rt 157. SB IL St Rt 163 near Westview. The eastern end of IL St Rt 163. The eastern end marker.
