Gainesville, MO -- U.S. city in Missouri Population (2000): 632 Housing Units (2000): 339 Land area (2000): 2.641455 sq. miles (6.841337 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.641455 sq. miles (6.841337 sq. km) FIPS code: 26218 Located within: Missouri (MO), FIPS 29 Location: 36.603520 N, 92.430709 W ZIP Codes (1990): 65655 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gainesville, MO Gainesville