64504 -- U.S. ZIP code Municipality (1990): SAINT JOSEPH, Missouri All ZIPs for this municipality (1990): 64501 64503 64504 64505 64506 64507 Population (2000): 10926 Housing Units (2000): 4641 Land area (2000): 46.100534 sq. miles (119.399830 sq. km) Water area (2000): 0.748385 sq. miles (1.938308 sq. km) Total area (2000): 46.848919 sq. miles (121.338138 sq. km) Located within: Missouri (MO) Location: 39.707694 N, 94.873542 W