63851 -- U.S. ZIP code Municipality (1990): HAYTI HEIGHTS, Missouri All ZIPs for this municipality (1990): 63851 Population (2000): 4622 Housing Units (2000): 2016 Land area (2000): 51.358372 sq. miles (133.017567 sq. km) Water area (2000): 0.114793 sq. miles (0.297313 sq. km) Total area (2000): 51.473165 sq. miles (133.314880 sq. km) Located within: Missouri (MO) Location: 36.235881 N, 89.748619 W