64505 -- U.S. ZIP code Municipality (1990): SAINT JOSEPH, Missouri All ZIPs for this municipality (1990): 64501 64503 64504 64505 64506 64507 Population (2000): 12587 Housing Units (2000): 5130 Land area (2000): 39.776512 sq. miles (103.020689 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 39.776512 sq. miles (103.020689 sq. km) Located within: Missouri (MO) Location: 39.812344 N, 94.842867 W