Newtonia, MO -- U.S. town in Missouri Population (2000): 231 Housing Units (2000): 92 Land area (2000): 0.329039 sq. miles (0.852206 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.329039 sq. miles (0.852206 sq. km) FIPS code: 52292 Located within: Missouri (MO), FIPS 29 Location: 36.878542 N, 94.182664 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Newtonia, MO Newtonia