Iroquois County Highway 31 runs east-west from Watseka to the Illinois/Indiana State Line, near Iroquois. ICH 31 passes through the following towns in Iroquois County. Watseka Iroquois ICH 31 intersects the following highways in Iroquois County. Iroquois County Highway 15, near Iroquois. U.S. Rt. 52, at Iroquois. Iroquois County Highway 48, near Iroquois.
