, officially the Commonwealth of Pennsylvania, is a state located in the northern and Mid-Atlantic regions of the United States. Harrisburg
is the capital city of the U.S. state of Pennsylvania and the county seat of Dauphin County.
is the largest city in the Commonwealth of Pennsylvania and the fifth-most populous in the United States, with an estimated population in 2014 of 1,560,297.
is the second-largest city in the Commonwealth of Pennsylvania, and the county seat of Allegheny County.
is a city located in Lehigh County, Pennsylvania, United States. Erie
is a city located in northwestern Pennsylvania, United States. Named for the lake and the Native American tribe that resided along its southern shore.
The Delaware River
is a major river on the Atlantic coast of the United States. Its watershed drains an area of 14,119 square miles (36,570 km2) in four U.S. states — New York, New Jersey, Pennsylvania and Delaware.
The Susquehanna River
is a river located in the northeastern United States. At 464 miles (747 km) long, it is the longest river on the American east coast that drains into the Atlantic Ocean.
The Ohio River
, which streams westward from Pittsburgh, Pennsylvania, to Cairo, Illinois, is the largest tributary, by volume, of the Mississippi River in the United States.