63783 -- U.S. ZIP code Municipality (1990): UNIONTOWN, Missouri All ZIPs for this municipality (1990): 63783 Population (2000): 161 Housing Units (2000): 62 Land area (2000): 6.141302 sq. miles (15.905899 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 6.141302 sq. miles (15.905899 sq. km) Located within: Missouri (MO) Location: 37.605626 N, 89.677402 W