Wheaton, MO -- U.S. city in Missouri Population (2000): 721 Housing Units (2000): 318 Land area (2000): 0.507650 sq. miles (1.314807 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.507650 sq. miles (1.314807 sq. km) FIPS code: 79126 Located within: Missouri (MO), FIPS 29 Location: 36.762339 N, 94.055121 W ZIP Codes (1990): 64874 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Wheaton, MO Wheaton