15220 -- U.S. ZIP code Municipality (1990): PARKWAY CENTER, Pennsylvania All ZIPs for this municipality (1990): 15220 Population (2000): 19693 Housing Units (2000): 9379 Land area (2000): 5.554296 sq. miles (14.385559 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 5.554296 sq. miles (14.385559 sq. km) Located within: Pennsylvania (PA) Location: 40.430822 N, 80.044530 W