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.
SB IL St Rt 1 at the Kankakee/Iroquois County Line. (April, 2015) SB IL St Rt 1 at the Kankakee/Iroquois County Line. (November, 2024) NB IL St Rt 1 near Papineau. NB IL St Rt 1 north of Martinton. NB IL St Rt 1 near Martinton. NB IL St Rt 1 near U.S. Rt. 52. NB IL St Rt 1 north of U.S. Rt. 52. A junction marker on EB U.S. Rt. 52. SB IL St Rt 1 south of U.S. Rt. 52. NB IL St Rt 1 north of Watseka. SB IL St Rt 1 near North Street in Watseka. SB IL St Rt 1 north of U.S. Rt. 24. A junction marker on EB U.S. Rt. 24. WB U.S. Rt. 24/NB IL St Rt 1 at their junction in Watseka. EB U.S. Rt. 24/SB IL St Rt 1 at Watseka. EB U.S. Rt. 24/SB IL St Rt 1 at 3rd in Watseka. A junction marker on EB U.S. Rt. 24/SB IL St Rt 1. A junction marker on EB U.S. Rt. 24/SB IL St Rt 1. EB U.S. Rt. 24/SB IL St Rt 1 on the eastside of Watseka. NB IL St Rt 1 south of U.S. Rt. 24. SB IL St Rt 1 south of U.S. Rt. 24. SB IL St Rt 1 south of U.S. Rt. 24. SB IL St Rt 1 north of Milford. SB IL St Rt 1 south of Milford. NB IL St Rt 1 near Wellington. NB IL St Rt 1 at the Iroquois/Vermilion County Line.
