description Ohio Overview
The Ohio River begins at Pittsburgh, Pennsylvania, where the Allegheny and Monongahela rivers meet, and flows about 981 miles, or 1,579 kilometers, to the Mississippi River at Cairo, Illinois. It forms or helps define boundaries involving Pennsylvania, Ohio, West Virginia, Kentucky, Indiana, and Illinois, making it a major geographic feature of the eastern United States. The river has served as a transportation corridor for coal, agriculture, and manufactured goods, and its watershed includes important industrial and urban centers.
help Ohio FAQ
Where does the Ohio River begin and end?
It begins in Pittsburgh, Pennsylvania, where the Allegheny and Monongahela rivers meet. It flows about 981 miles, or 1,579 kilometers, before joining the Mississippi River at Cairo, Illinois.
How long is the Ohio River?
The Ohio River is approximately 981 miles long, equivalent to about 1,579 kilometers. Its course runs southwest from Pittsburgh toward the Mississippi.
Which states does the Ohio River border?
The river forms or helps define boundaries involving Ohio, West Virginia, Kentucky, Indiana, and Illinois. Its headwaters are in Pennsylvania at Pittsburgh.
Does the Ohio River flow through the state of Ohio?
Much of the river forms Ohio's southern boundary rather than running through the state's interior. It continues to Cairo, Illinois, where it meets the Mississippi.
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