63821 -- U.S. ZIP code Municipality (1990): ARBYRD, Missouri All ZIPs for this municipality (1990): 63821 Population (2000): 999 Housing Units (2000): 470 Land area (2000): 33.640387 sq. miles (87.128198 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 33.640387 sq. miles (87.128198 sq. km) Located within: Missouri (MO) Location: 36.048279 N, 90.233432 W