Unionville, MO -- U.S. city in Missouri Population (2000): 2041 Housing Units (2000): 1048 Land area (2000): 1.991306 sq. miles (5.157458 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.991306 sq. miles (5.157458 sq. km) FIPS code: 75166 Located within: Missouri (MO), FIPS 29 Location: 40.476421 N, 93.006005 W ZIP Codes (1990): 63565 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Unionville, MO Unionville