Illinois State Route 37 is a north-south highway in the Central Williamson County. IL St Rt 37 passes through the following highways in Williamson County. Johnston City Marion
Pulleys Mill
IL St Rt 37 is not multi-plexed in Williamson County. IL St Rt 37 intersects the following highways in Williamson County. Illinois State Route 13, at Marion. Illinois State Route 148, near Pulleys Mill.
