Illinois State Route 242 runs north-south in North-Central Hamilton County. IL St Rt 242 passes through the following town in Hamilton County. Mc Leansboro
IL St Rt 242 is not multi-plexed in Hamilton County. IL St Rt 242 intersects the following highway in Hamilton County. Illinois State Route 142, at Mc Leansboro.
SB IL St Rt 242 at the Wayne/Hamilton County Line. SB IL St Rt 242 near Piopolis. A Hamilton County mile marker. SB IL St Rt 242 at IL St Rt 142. The southern end marker.
