Illinois Route 15

Illinois Route 15
Illinois Route 15
	IL 15 highlighted in red
Route information
	Maintained by IDOT
Length	149.64 mi (240.82 km)
Existed	November 5, 1918–present
Major junctions
West end	I-55 / I-64 / US 40 / IL 3 in East St. Louis
	I-255 / US 50 in East St. Louis; US 51 in Ashley; I-57 / I-64 in Mt. Vernon; US 45 in Fairfield; IL 1 in Mt. Carmel;
East end	SR 64 in Mt. Carmel
Location
Country	United States
State	Illinois
Counties	St. Clair, Washington, Jefferson, Wayne, Edwards, Wabash
Highway system
	Illinois State Highway System; Interstate; US; State; Tollways; Scenic;

Illinois Route 15 (IL 15) is a 149.64-mile-long (240.82 km) east–west highway in southern Illinois with its western terminus at Illinois Route 3, U.S. Route 40, I-55, and I-64, and its eastern terminus at Wabash River at the Illinois/Indiana Border where it meets State Road 64.