Illinois Route 105
Route information
Maintained by IDOT
Length	37.58 mi[1] (60.48 km)
Existed	1945[2]–present
Major junctions
West end	IL 48 in Decatur
Major intersections	US 36 / IL 121 in Decatur
East end	I-72 in Monticello
Location
Country	United States
State	Illinois
Counties	Macon, Piatt
Highway system
Illinois State Highway System Interstate US State Tollways Scenic
← IL 104 → IL 106

Illinois Route 105 (IL-105) is a highway in the U.S. state of Illinois. It is an east–west highway that runs from Illinois Route 48 in Decatur to Interstate 72 near Monticello. Illinois 105 is 37.58 miles (60.48 km) long.^[1]

Route description

The state highway serves a corn-and-soybean-growing region in Macon County and Piatt County. Roads such as IL-105 carry corn and soybeans to the refineries of Decatur for the manufacture of commodities such as soybean oil and corn syrup.

Rural towns along Illinois Route 105 include Bement and Cerro Gordo. The highway also runs past the Bryant Cottage State Historic Site.

History

SBI Route 105 was what Illinois Route 104 is now from Meredosia to Quincy from 1924 thru 1937. In 1945, the number was reused on former Illinois Route 47 north of Decatur. This is the current routing for Illinois 105.^[2]

Major Intersections

County	Location	mi[3]	km	Destinations	Notes
Macon	Decatur	0.0	0.0	IL 48 – Taylorville
		1.0	1.6	US 51 Bus. south – Pana	West end of US 51 Business concurrency
		1.3	2.1	US 51 Bus. north – Bloomington	East end of US 51 Business concurrency
		3.9	6.3	US 36 / IL 121 south – Tuscola, Mattoon, Springfield	West end of IL 121 concurrency
		4.0	6.4	IL 121 north – Lincoln	East end of IL 121 concurrency
Piatt	​	14.7	23.7	IL 32 south – Lovington	West end of IL 32 concurrency
	Cerro Gordo	17.6	28.3	IL 32 north – Cisco	East end of IL 32 concurrency
	Monticello	37.58	60.48	I-72 – Champaign, Decatur	Exit 166 (Interstate 72)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus