Fairfax, MO -- U.S. city in Missouri Population (2000): 645 Housing Units (2000): 342 Land area (2000): 0.479429 sq. miles (1.241716 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.479429 sq. miles (1.241716 sq. km) FIPS code: 23266 Located within: Missouri (MO), FIPS 29 Location: 40.339530 N, 95.391961 W ZIP Codes (1990): 64446 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Fairfax, MO Fairfax