Illinois 37 is a north-south route following along the I-57 corridor. It begins just south of Effingham and runs south to the Cairo area.
Intersections from north to south:
IL37 begins in the north at US45, near Watson.
IL185 at Farina
I-64 near Mt. Vernon
IL154 near Whittington
IL13 at Marion
IL169 near Grand Chain
IL37 meets is southern terminus at US51 near Urbandale, where IL3's southern endpoint is
It passes through these towns: Urbandale, Mound City, Olmsted, Grand Chain, Cypress, Buncombe, Goreville, Marion, Johnston City, West Frankfort, Benton, Whittington, Ina, Bonnie, Mt. Vernon, Dix, Salem, Alma, Kinmundy, Farina, La Clede, Edgewood, Mason, and Watson. (Towns are in order from south to north.)