About Philadelphia

Philadelphia is a major city in the Commonwealth of Pennsylvania in the United States. With a population of 1,603,797 as of 2020, Philadelphia is Pennsylvania's most populous city, the sixth most populous city in the U.S., and the second most populous city on the U.S. East Coast, behind New York City. Since 1854, the city has had the same geographic boundaries as Philadelphia County, the most populous county in Pennsylvania and the urban core of the Delaware Valley, the nation's seventh largest and world's 35th largest metropolitan region with 6.096 million residents as of 2020.Philadelphia was founded in 1682 by William Penn, an English Quaker. The city served as capital of the Pennsylvania Colony during the British colonial era. Philadelphia went on to play a historic and vital role in the 18th century as the central meeting place for the nation's founding fathers whose plans and actions in Philadelphia ultimately inspired and resulted in the American Revolution.