The Commonwealth of Pennsylvania is a U.S Commonwealth located in the Northeastern and Middle Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to the east. The state's four most populous cities are Philadelphia, Pittsburgh, Allentown, and Erie. The state capital is Harrisburg. Pennsylvania has 51 miles of coastline along Lake Erie and 57 miles of shoreline along the Delaware Estuary. (Sources: Pennsylvania; 50States.com; Bing search; Facebook; Fiscal Sponsor Directory; Flikr; Fodor's; Google+; Google search; Instagram; LinkedIn; Lonely Planet; National Association of Counties; National Governors Association; Pinterest; TripAdvisor; Twitter; US Census Bureau; Wikipedia; Yahoo search; YouTube; ResNet contributors: Mary Vaccari, Rick Rodgers)

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