Illinois Route 135
IL 135 highlighted in red
Route information
Maintained by IDOT
Length	20.31 mi[1] (32.69 km)
Existed	March 1937[2]–present
Major junctions
CCW end	IL 164 in Kirkwood
Major intersections	US 67 in Alexis
CW end	Main Street in Alexis
Location
Country	United States
State	Illinois
Counties	Warren, Mercer
Highway system
Illinois State Highway System Interstate US State Tollways Scenic
← IL 134 → US 136

Illinois Route 135 (IL 135) is a 20.31-mile (32.69 km), L-shaped state road in Warren County, Illinois, United States, that runs from IL 164 west of Monmouth to Main Street in Alexis, at the base of the town's water tower.^[1]

Route description

IL 135 is an undivided two-lane surface road for its entire length. It runs concurrently with IL 94 for a few miles north of Little York, and with U.S. Route 67 (US 67) for a few miles west of Alexis. IL 135 is signed in all four directions and changes directions at the turnoff from IL 94.

History

SBI Route 135 originally ran from IL 1 to State Road 154 (SR 154) near Hutsonville via a bridge over the Wabash River. This was removed in 1935; the bridge is now unnumbered. In 1937 it was applied on what was IL 94B, the current routing.^[2]

Major intersections

County	Location	mi[3]	km	Destinations	Notes
Warren	​	0.00	0.00	IL 164 – Monmouth, Oquawka	Southern terminus; road continues south as 20th Street
	​	7.6	12.2	IL 94 south – Biggsville	Southern end of IL 94 concurrency
Warren–Mercer county line	​	10.6	17.1	IL 94 north – Aledo	Northern end of IL 94 concurrency
	​	16.8	27.0	US 67 south – Monmouth	Western end of US 67 concurrency
Mercer	​	18.6	29.9	US 67 north – Viola	Eastern end of US 67 concurrency
Mercer–Warren county line	Alexis	20.31	32.69	Main Street	Northern terminus; road continues east as Hunt Avenue
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus