The Wabash River ( French : Ouabache ) is a river in the Midwestern United States that flows southwest from northwest Ohio near Fort Recovery across northern Indiana to southern Illinois , where it forms the Illinois-Indiana border before draining into the Ohio River , of which it is the largest northern tributary .
The Wabash River ( French : Ouabache ) is a 503 mi river in the Midwestern United States that flows southwest from northwest Ohio near Fort Recovery across northern Indiana to southern Illinois . It forms the Illinois-Indiana border before draining into the Ohio River , of which it is the largest northern tributary .