Illinois Route 81
IL 81 highlighted in red
Route information
Maintained by IDOT
Length	25.78 mi[1] (41.49 km)
Existed	1924[2]–present
Major junctions
West end	US 150 in Lynn Center
Major intersections	I-74 / IL 110 (CKC) in Andover
East end	IL 78 in Kewanee
Location
Country	United States
State	Illinois
Counties	Henry
Highway system
Illinois State Highway System Interstate US State Tollways Scenic
← I-80 → IL 82

Illinois Route 81 is an east–west state road in northwest Illinois. It runs from U.S. Route 150 by unincorporated Lynn Center to Illinois Route 78 (Main Street) in Kewanee. This is a distance of 25.78 miles (41.49 km).^[1]

Route description

In Kewanee, Illinois 81 is 6th Street. It is not that far away from U.S. Route 34, which is 2nd street. In addition to Kewanee, Illinois 81 also serves Andover and Cambridge.

History

SBI Route 81 was established as Lynn Center to Kewanee. The routing of Illinois 81 has not changed since it was established.

Major intersections

The entire route is in Henry County.

Location	mi[3]	km	Destinations	Notes
​	0.0	0.0	US 150 – Galesburg, Moline
​	2.2	3.5	I-74 – Moline, Rock Island, Galesburg	Exit 24 (I-74)
Cambridge	10.6	17.1	IL 82 south	Begin/end concurrency with IL 82
​	11.6	18.7	IL 82 north – Geneseo	Begin/end concurrency with IL 82
Kewanee	25.78	41.49	IL 78
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus