Sumner, MO -- U.S. town in Missouri Population (2000): 142 Housing Units (2000): 99 Land area (2000): 0.258332 sq. miles (0.669076 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.258332 sq. miles (0.669076 sq. km) FIPS code: 71620 Located within: Missouri (MO), FIPS 29 Location: 39.656342 N, 93.243426 W ZIP Codes (1990): 64681 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Sumner, MO Sumner