Illinois Route 121

Illinois Route 121
Illinois Route 121
	IL 121 highlighted in red
Route information
	Maintained by IDOT
Length	109.48 mi (176.19 km)
Existed	1924–present
Major junctions
South end	IL 130 in Greenup
	US 45 in Trilla; I-57 in Mattoon; US 45 in Mattoon; US 36 / IL 105 in Decatur; I-72 / US 51 in Decatur; I-55 BL in Lincoln;
North end	I-55 in Lincoln
Location
Country	United States
State	Illinois
Counties	Cumberland, Coles, Moultrie, Macon, Logan
Highway system
	Illinois State Highway System; Interstate; US; State; Tollways; Scenic;

Illinois Route 121 (IL 121) is a 109.48-mile-long (176.19 km) major state highway in the central part of the U.S. state of Illinois. Although it travels from northwest to southeast, it is marked as a north–south highway. It travels from IL 130 in Greenup (very near U.S. Route 40) to Interstate 55 (I-55) in Lincoln at the interchange of I-55 and IL 10.