Pennsylvania, one of the Middle Atlantic states of the United States.
Pennsylvania is bordered by New Jersey, across the Delaware River (E), Delaware (SE), Maryland (S), West Virginia (SW), Ohio (W), Lake Erie and New York (N).
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Pennsylvania (the Commonwealth of Pennsylvania) is one of four states of the United States of America that is called a commonwealth.
Pennsylvania is called the Keystone State.
The US postal abbreviation for Pennsylvania is PA.
Pennsylvania is one of the U.S.'s most historic states. Philadelphia is often called the cradle of the American Nation. It was here that the Declaration of Independence and the Constitution were drawn up by the Founding Fathers.
The "Pennsylvania Dutch" region in south-central Pennsylvania is another favorite of sightseers. Pennsylvania Germans, including the Amish and the Mennonites, dominate the area around the cities of Lancaster, York, and Harrisburg, with smaller numbers extending northeast to the Lehigh Valley and up the Susquehanna River valley.
The population of Pennsylvania is 12,702,379 according to 2010 census.