15063 -- U.S. ZIP code Municipality (1990): MONONGAHELA, Pennsylvania All ZIPs for this municipality (1990): 15063 Population (2000): 12275 Housing Units (2000): 5502 Land area (2000): 28.200953 sq. miles (73.040129 sq. km) Water area (2000): 0.001954 sq. miles (0.005060 sq. km) Total area (2000): 28.202907 sq. miles (73.045189 sq. km) Located within: Pennsylvania (PA) Location: 40.196694 N, 79.926426 W