63945 -- U.S. ZIP code Municipality (1990): HARVIELL, Missouri All ZIPs for this municipality (1990): 63945 Population (2000): 1171 Housing Units (2000): 527 Land area (2000): 38.739869 sq. miles (100.335795 sq. km) Water area (2000): 0.024864 sq. miles (0.064397 sq. km) Total area (2000): 38.764733 sq. miles (100.400192 sq. km) Located within: Missouri (MO) Location: 36.637085 N, 90.526872 W