Darby Borough, Pennsylvania, is situated in the hills overlooking the Philadelphia International Airport. It combines a strategic location with an excellent transportation network and a superlative history. The borough is in Delaware County and is distinct from the nearby Darby Township municipality.
Pennsylvania is in the Mid-Atlantic, Northeastern, and Appalachian regions of the U.S. It shares borders with Delaware, Maryland, West Virginia, Ohio, Lake Erie, Ontario (Canada), New York, and New Jersey. It is the 33rd-largest state by area, the fifth-most populous state (about 13,011,844 residents), and the ninth-most densely populated. Its capital city is Harrisburg.