Unionville, IA -- U.S. city in Iowa Population (2000): 127 Housing Units (2000): 68 Land area (2000): 0.744747 sq. miles (1.928886 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.744747 sq. miles (1.928886 sq. km) FIPS code: 79680 Located within: Iowa (IA), FIPS 19 Location: 40.818515 N, 92.694443 W ZIP Codes (1990): 52594 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Unionville, IA Unionville