Delaware Valley From Wikipedia, the free encyclopedia Jump to navigation Jump to search This article is about the Philadelphia metropolitan area. For other uses, see Delaware Valley (disambiguation). Metropolitan area in the United States Delaware Valley Greater Philadelphia Southeastern Pennsylvania Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA Metropolitan area Philadelphia Map of the Lower Delaware Valley Metropolitan Area Country United States State - Pennsylvania - New Jersey - Delaware - Maryland Principal cities Philadelphia Camden Wilmington Reading Trenton Atlantic City Vineland Hammonton Dover Area • Urban 1,981.4 sq mi (5,131.7 km 2 ) • Metro 5,118 sq mi (13,256 km 2 ) Elevation [1] [ dubious – discuss ] [2] 0 - 1,080 ft (0 - 329 m) Population (2013 est.) • Density 2,746.32/sq mi (1,060.36/km 2 ) ...