Illinois State Route 1 is the main north-south highway in Central Iroquois County. It is a main route through Watseka. IL St Rt 1 passes through the following towns in Iroquois County. Milford Watseka
Martinton
IL St Rt 1 is multi-plexed in Iroquois County. U.S. Rt. 24, at Watseka.
IL St Rt 1 intersects the following highways in Iroquois County. U.S. Rt. 24, near Watseka.
NB IL St Rt 1 near Papineau. NB IL St Rt 1 near Martinton. NB IL St Rt 1 near U.S. Rt. 52. EB U.S. Rt. 24/SB IL St Rt 1 at Watseka. A junction marker on EB U.S. Rt. 24/SB IL St Rt 1.
