The Wabash River is a 503-mile-long river that drains most of the state of Indiana in the United States. It flows from the headwaters in Ohio, near the Indiana border, then southwest across northern Indiana turning south near the Illinois border where the southern portion forms the Indiana-Illinois border before flowing into the Ohio River. It is the largest northern tributary of the Ohio River and third largest overall, right behind the Cumberland and Tennessee Rivers. From the dam near Huntington, Indiana, to its terminus at the Ohio River, the Wabash flows freely for 411 miles. Its watershed drains most of Indiana. The Tippecanoe River, White River, Embarras River and Little Wabash River are major tributaries. The river's name comes from a Miami Indian word meaning "water over white stones".
The Wabash is the state river of Indiana, and subject of the state song "On the Banks of the Wabash, Far Away" by Paul Dresser.