64161 -- U.S. ZIP code Municipality (1990): RANDOLPH, Missouri All ZIPs for this municipality (1990): 64117 64161 Population (2000): 427 Housing Units (2000): 187 Land area (2000): 16.291134 sq. miles (42.193842 sq. km) Water area (2000): 0.002445 sq. miles (0.006333 sq. km) Total area (2000): 16.293579 sq. miles (42.200175 sq. km) Located within: Missouri (MO) Location: 39.164953 N, 94.466904 W