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Bookmark or Share- Ohio River | Geography, History & Importance | BritannicaOhio River, major river artery of the east-central United States. Formed by the confluence of the Allegheny and Monongahela rivers at Pittsburgh, it flows northwest out of Pennsylvania, then in a general southwesterly direction to join the Mississippi River at Cairo, Illinois (see photograph),
- Quick Facts | The Ohio River | Ohio River FoundationThe Ohio River is 981 miles long, starting at the confluence of the Allegheny and the Monongahela Rivers in Pittsburgh, Pennsylvania, and ending in Cairo, Illinois, where it flows into the Mississippi River. The Ohio River flows through or borders six states: Illinois, Indiana, Kentucky, Ohio, Pennsylvania and West Virginia.
- The Ohio River - U.S. National Park ServiceBeginning at Pittsburgh, Pennsylvania, the Ohio is formed by the confluence of the Allegheny and Monongahela Rivers. It ends 981 miles later at Cairo, Illinois when it empties into the Mississippi. The average depth is 24 feet, with the deepest section of 130 feet near Louisville, Kentucky.
- Ohio River: A Historical & Ecological Marvel - Ocean InfoNamed The Great River by North American tribes, the Ohio River is rich in history and a biodiverse life source for mankind for hundreds of years. The Ohio River’s waters, buzzing with life and industry, are steeped in a rich history and hold an iconic place in the heart of North America.
- Where Does the Ohio River Start and End: Facts about the Ohio ...The Ohio River is at the boundary of the Midwestern and Southern United States, flowing southwesterly 981 miles (1582 km) long, starting at the confluence of the Allegheny & the Monongahela Rivers in Pittsburgh, Pennsylvania, and ending in Cairo, Illinois, where it flows into the Mississippi River.
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