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There are 56 municipalities classified as cities in the U.S. state of Pennsylvania. Each city is further classified based on population, with Philadelphia being of the first class, Pittsburgh of the second class, Allentown of the second class A, and the remaining 53 cities being of the third class.
Pennsylvania is one of the 50 states in the United States of America. It is in the northeastern part of the country. It has a border with Ohio on the west, West Virginia on the south and west, Maryland and Delaware on the south, New Jersey on the east, and New York and Lake Erie on the north.
The following outline is provided as an overview of and topical guide to the United States Commonwealth of Pennsylvania : The Commonwealth of Pennsylvania is the fifth most populous of the 50 states of the United States. Pennsylvania lies west of the Delaware River in the Mid-Atlantic United States .
