What is Ohio River's largest tributary?

Without question or competition, the largest tributary to the Ohio River is the Tennessee River, which accounts for fully 1/4 of the Ohio's average total discharge volume. read more

Direct and indirect tributaries of the Ohio River in the United States. The river is formed by the confluence of the Allegheny and Monongahela rivers at Point State Park in downtown Pittsburgh. read more

Without question or competition, the largest tributary to the Ohio River is the Tennessee River, which accounts for fully 1/4 of the Ohio’s average total discharge volume. read more

Ohio River Tributary Watersheds: East. The Ohio River tributaries (east) watershed is located in the eastern region of Ohio. It drains a total of 2,454 square miles and flows through all or part of 11 counties. Municipalities partially or fully in the watershed include Steubenville, Cadiz, Marietta and Belpre. read more