15131 -- U.S. ZIP code Municipality (1990): WHITE OAK, Pennsylvania All ZIPs for this municipality (1990): 15131 Population (2000): 9132 Housing Units (2000): 4119 Land area (2000): 7.813807 sq. miles (20.237666 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 7.813807 sq. miles (20.237666 sq. km) Located within: Pennsylvania (PA) Location: 40.341469 N, 79.811058 W