Pennsylvania (US) size comparison
119,283 km2 / 46,043 mile2
Pennsylvania, officially the Commonwealth of Pennsylvania, is a state in the Northeastern, Great Lakes, Appalachian, and Mid-Atlantic regions of the United States. The Commonwealth is bordered by Delaware to the southeast, Maryland to the south, West Virginia to the southwest, Ohio to the west, Lake Erie and the Canadian province of Ontario to the northwest, New York to the north, and New Jersey to the east, while the Appalachian Mountains run through its middle.
Pennsylvania is the 33rd-largest state by area, and the 5th-most populous state according to the most recent official U.S. Census count in 2010.