15411 -- U.S. ZIP code Municipality (1990): ADDISON, Pennsylvania All ZIPs for this municipality (1990): 15411 Population (2000): 681 Housing Units (2000): 707 Land area (2000): 21.172244 sq. miles (54.835859 sq. km) Water area (2000): 1.662322 sq. miles (4.305395 sq. km) Total area (2000): 22.834566 sq. miles (59.141254 sq. km) Located within: Pennsylvania (PA) Location: 39.751296 N, 79.351132 W