Actually, the Ohio River doesn't “border” Pennsylvania, but rather flows through the state from the confluence of the Allegheny and Monongahela Rivers at Pittsburgh to the point where it crosses the state line near Georgetown, PA. read more
Starting in western Pennsylvania, the Ohio River borders Ohio, West Virginia, Kentucky, Indiana, and Illinois. The Ohio River does not border 44 States. read more
The boundary between Kentucky and the three states to its north – Ohio, Indiana, and Illinois – is the north bank of the Ohio river. In 1763, Britain defeated France in the Seven Years' War, whose North American theater was called the French and Indian War. read more