Illinois Route 31

Illinois Route 31
Illinois Route 31
	IL 31 highlighted in red
Route information
	Maintained by IDOT
Length	58.41 mi (94.00 km)
Existed	1937–present
Major junctions
South end	US 34 in Oswego
	US 30 in Montgomery; ; ; ; I-88 Toll / IL 56 Toll / IL 110 (CKC) in North Aurora; US 20 in Elgin; ; I-90 Toll in Elgin; US 14 in Crystal Lake;
North end	US 12 in Richmond
Location
Country	United States
State	Illinois
Counties	Kendall, Kane, McHenry
Highway system
	Illinois State Highway System; Interstate; US; State; Tollways; Scenic;

Illinois Route 31 (IL 31) is a 58.41-mile-long (94.00 km) north–south state highway in northeastern Illinois, United States. It travels from U.S. Route 34 (US 34) in Oswego north to US 12, near the Wisconsin state line, just south of Richmond.^[1]

^ ^a ^b Illinois Technology Transfer Center (2007). "T2 GIS Data". Illinois Department of Transportation. Retrieved November 8, 2007.
^ Carlson, Rich (March 15, 2006). "Routes 21 thru 40". Illinois State Highways Page. Retrieved March 22, 2006.^{[self-published source]}