Topography
Philadelphia is located at 40° 00' north latitude and 75° 09' west longitude. According to the United States Census Bureau, the city has a total area of 369.4 km² (142.6 mi²). 349.9 km² (135.1 mi²) of it is land and 19.6 km² (7.6 mi²) of it (5.29%) is water. Bodies of water include the Delaware River, Schuylkill River, Cobbs Creek, Wissahickon Creek, and Pennypack Creek.
The lowest point in the city lies 10 feet above sea level near Fort Mifflin in Southwest Philadelphia at the convergence of the Delaware and Schuylkill Rivers. The highest point is in Chestnut Hill, at 432 feet above sea level, near Evergreen Place, just north and west of Evergreen Avenue.
The counties adjacent to Philadelphia are Montgomery County to the north; Bucks County to the northeast; Burlington County, New Jersey to the east; Camden County, New Jersey to the southeast; Gloucester County, New Jersey to the south; and Delaware County to the west.
(Source: Wikipedia.org)
