Illinois State Route 40 is a north-south route in western Marshall County. IL St Rt 40 passes through the following towns in Marshall County. Lawn Ridge Camp Grove
IL St Rt 40 intersects the following highway in Marshall County. Illinois State Route 17, near Camp Grove.
Marshall County mile marker. WB IL St Rt 17/NB IL St Rt 40 south of Camp Grove. EB IL St Rt 17/SB IL St Rt 40 near Camp Grove. WB IL St Rt 17/NB IL St Rt 40 north of east IL St Rt 17. NB IL St Rt 40 at east IL St Rt 17. SB IL St Rt 40 near Spear.
