The Ohio River is a 981-mile (1,579 km) long river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing...

ohiːyo', meaning "good river", "great river" or "large creek". The Ohio River forms its southern border, though nearly all of the river itself belongs to Kentucky...

is the only non-rectangular flag of all U.S. states. Ohio derives its name from the Ohio River that forms its southern border, which, in turn, originated...

The Ohio River flood of 1937 took place in late January and February 1937. With damage stretching from Pittsburgh, Pennsylvania, to Cairo, Illinois, 385...

Mississippi River itself and its numerous natural tributaries and distributaries. The major tributaries are the Illinois, Missouri, Ohio and Red rivers. Given...

crossings of the Ohio River from the mouth at the Mississippi River at Cairo, Illinois to the confluence of the Allegheny and Monongahela Rivers at Pittsburgh...

is a list of locks and dams of the Ohio River, which begins at the confluence of the Allegheny and Monongahela rivers at The Point in Pittsburgh, Pennsylvania...

the Old Northwest and formally known as the Territory Northwest of the River Ohio, was formed from unorganized western territory of the United States after...

west of the Ohio River were organized as the state of Ohio, admitted to the Union in 1803. In the 17th century, the area north of the Ohio River was occupied...

terminus at the Ohio River, the Wabash flows freely for 411 miles (661 km) The Tippecanoe River, White River, Embarras River and Little Wabash River are major...