63383 -- U.S. ZIP code Municipality (1990): WARRENTON, Missouri All ZIPs for this municipality (1990): 63383 Population (2000): 12188 Housing Units (2000): 5121 Land area (2000): 177.046592 sq. miles (458.548549 sq. km) Water area (2000): 0.514651 sq. miles (1.332940 sq. km) Total area (2000): 177.561243 sq. miles (459.881489 sq. km) Located within: Missouri (MO) Location: 38.818852 N, 91.170000 W