63855 -- U.S. ZIP code Municipality (1990): HORNERSVILLE, Missouri All ZIPs for this municipality (1990): 63855 Population (2000): 1235 Housing Units (2000): 549 Land area (2000): 73.559287 sq. miles (190.517670 sq. km) Water area (2000): 0.220228 sq. miles (0.570387 sq. km) Total area (2000): 73.779515 sq. miles (191.088057 sq. km) Located within: Missouri (MO) Location: 36.048254 N, 90.085399 W