Illinois Route 156
IL 156 highlighted in red
Route information
Maintained by IDOT
Length	22.95 mi[1] (36.93 km)
Existed	1926[2]–present
Major junctions
West end	South Meyer Avenue / C Road in Valmeyer
East end	IL 13 in New Athens
Location
Country	United States
State	Illinois
Counties	Monroe, St. Clair
Highway system
Illinois State Highway System Interstate US State Tollways Scenic
← IL 155 → IL 157

Illinois Route 156 is an east–west state road in southwestern Illinois. It runs from South Meyer Avenue & C Road in Valmeyer to just west of New Athens. This is a distance of 22.95 miles (36.93 km).^[1]

Route description

Illinois 156 runs through rural southwestern Illinois. It is the main east–west state road through Waterloo. Illinois 156 overlaps Illinois Route 159 from Hecker north for a short distance, when 156 leaves 159 and turns back toward its eastern terminus.

History

SBI Route 156 is the same as Illinois 156 is now. There have been no changes since 1926.^[2]

Major Intersections

County	Location	mi[3]	km	Destinations	Notes
Monroe	Valmeyer	0.0	0.0	S Meyer Avenue / C Road
	Waterloo	7.0	11.3	IL 3 – Wartburg, Maeystown
	Hecker	16.8	27.0	IL 159 south	West end of IL 159 concurrency
St. Clair	​	18.1	29.1	IL 159 north – Belleville	East end of IL 159 concurrency
	​	22.95	36.93	IL 13 – Belleville, New Athens
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus