Union City, OH -- U.S. village in Ohio Population (2000): 1767 Housing Units (2000): 780 Land area (2000): 0.920802 sq. miles (2.384865 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.920802 sq. miles (2.384865 sq. km) FIPS code: 78624 Located within: Ohio (OH), FIPS 39 Location: 40.199975 N, 84.801045 W ZIP Codes (1990): 45390 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Union City, OH Union City