63863 -- U.S. ZIP code Municipality (1990): MALDEN, Missouri All ZIPs for this municipality (1990): 63863 Population (2000): 6955 Housing Units (2000): 3053 Land area (2000): 70.921471 sq. miles (183.685758 sq. km) Water area (2000): 0.072152 sq. miles (0.186873 sq. km) Total area (2000): 70.993623 sq. miles (183.872631 sq. km) Located within: Missouri (MO) Location: 36.569283 N, 89.974231 W