Illinois State Route 78 is a north-south highway in Eastern Jo Daviess County. It runs from the Illinois/Wisconsin State Line, near Watson, to the Jo Daviess/Carroll County Line, near Pleasant Valley. IL St Rt 78 passes through the following towns in Jo Daviess County. Warren
Stockton Pleasant Valley U.S. Rt. 20 is multi-plexed in Jo Daviess County. U.S. Rt. 20, near Stockton. IL St Rt 78 intersects the following highways in Jo Davies County. U.S. Rt. 20, near Stockton. U.S. Rt. 20, near Stockton.
SB IL St Rt 78 at the Illinois/Wisconsin State Line. SB IL St Rt 78 at the Illinois Welcome Sign. A Jo Daviess County mile marker. SB IL St Rt 78 near Warren.
