Route information | ||||
---|---|---|---|---|
Maintained by IDOT | ||||
Length | 155.07 mi[1] (249.56 km) | |||
Existed | November 5, 1918[2]–present | |||
Major junctions | ||||
South end | US 51 / IL 3 in Cairo | |||
I-64 in Mt. Vernon US 50 in Salem | ||||
North end | US 45 in Watson | |||
Location | ||||
Country | United States | |||
State | Illinois | |||
Counties | Alexander, Pulaski, Johnson, Williamson, Franklin, Jefferson, Marion, Fayette, Clay, Effingham | |||
Highway system | ||||
|
Illinois Route 37, Illinois 37 or IL 37, is a 155.07-mile-long (249.56 km) north–south state highway in southern Illinois. IL 37's southern terminus is at U.S. Route 51 (US 51) and IL 3 in Cairo and the northern terminus is at US 45 in Watson.[1]