15057 -- U.S. ZIP code Municipality (1990): MC DONALD, Pennsylvania All ZIPs for this municipality (1990): 15057 Population (2000): 11259 Housing Units (2000): 4583 Land area (2000): 48.992386 sq. miles (126.889693 sq. km) Water area (2000): 0.080073 sq. miles (0.207388 sq. km) Total area (2000): 49.072459 sq. miles (127.097081 sq. km) Located within: Pennsylvania (PA) Location: 40.357286 N, 80.236299 W