It is the sixth-largest city in the United States and the largest in the state of Pennsylvania. On the East Coast, Philadelphia is the second largest city after New York.
The city sits on the Delaware River in the center of the Delaware Valley metropolitan area. It is the seventh largest in the country and one of the world's largest metropolitan regions, home to over 6.2 million inhabitants.
Since 1854, Philadelphia has also been the seat of Philadelphia County, the boundaries of which are within the city limits.
