64088 -- U.S. ZIP code Municipality (1990): SIBLEY, Missouri All ZIPs for this municipality (1990): 64088 Population (2000): 1443 Housing Units (2000): 517 Land area (2000): 30.487652 sq. miles (78.962652 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 30.487652 sq. miles (78.962652 sq. km) Located within: Missouri (MO) Location: 39.152070 N, 94.183552 W