Which is the only U.S. state to begin with the letter 'P'?

Pennsylvania, officially the Commonwealth of Pennsylvania, is a state in the Great Lakes, Appalachian, and Mid-Atlantic regions of the Northeastern 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. It is the 9th-most densely populated of the 50 states. Pennsylvania's two most populous cities are Philadelphia (1,580,863), and Pittsburgh (302,407). The state capital and its 13th-largest city is Harrisburg. Pennsylvania has 140 miles (225 km) of waterfront along Lake Erie and the Delaware River.

There is only one US state that begins with the letter P; Pennsylvania.