15120 -- U.S. ZIP code Municipality (1990): MUNHALL, Pennsylvania All ZIPs for this municipality (1990): 15120 Population (2000): 20437 Housing Units (2000): 10020 Land area (2000): 4.564162 sq. miles (11.821125 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 4.564162 sq. miles (11.821125 sq. km) Located within: Pennsylvania (PA) Location: 40.395336 N, 79.906351 W