64485 -- U.S. ZIP code Municipality (1990): SAVANNAH, Missouri All ZIPs for this municipality (1990): 64485 Population (2000): 7637 Housing Units (2000): 3100 Land area (2000): 107.891455 sq. miles (279.437573 sq. km) Water area (2000): 0.082503 sq. miles (0.213683 sq. km) Total area (2000): 107.973958 sq. miles (279.651256 sq. km) Located within: Missouri (MO) Location: 39.947280 N, 94.835807 W