Area: 46,055 sq mi (119,283 sq km).
Population: ~ 13,020,000.
Largest cities: Philadelphia, Pittsburgh, Allentown, Erie, Reading, Scranton, Bethlehem, Lancaster, Harrisburg, Altoona, York, Wilkes-Barre, Chester, Williamsport, Easton, Lebanon, Hazleton, New Castle, Johnstown, McKeesport, Hermitage, New Kensington, Coatesville, St. Marys, Greensburg, Pottsville, Sharon, Butler, Washington, Meadville, Lower Burrell.
Pennsylvania is a state located in the Northeast, Great Lakes and Mid-Atlantic region of the United States. The Appalachian Mountains run through the middle. 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 east.
Pennsylvania is the 33rd largest state by area and the 5th most populous state, according to the most recent official US census data for 2010. It is the 9th most densely populated state in the United States, out of a total of 50 states. Pennsylvania's two most populous cities are Philadelphia (1,580,863) and Pittsburgh (302,407). Harrisburg is the state capital and the tenth largest city in the state.
Image source: @geology.com