Unionville, MI -- U.S. village in Michigan Population (2000): 605 Housing Units (2000): 246 Land area (2000): 0.927567 sq. miles (2.402387 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.927567 sq. miles (2.402387 sq. km) FIPS code: 81420 Located within: Michigan (MI), FIPS 26 Location: 43.654121 N, 83.468263 W ZIP Codes (1990): 48767 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Unionville, MI Unionville