Plain City, UT -- U.S. city in Utah Population (2000): 3489 Housing Units (2000): 1001 Land area (2000): 3.730265 sq. miles (9.661342 sq. km) Water area (2000): 0.005039 sq. miles (0.013050 sq. km) Total area (2000): 3.735304 sq. miles (9.674392 sq. km) FIPS code: 60710 Located within: Utah (UT), FIPS 49 Location: 41.299492 N, 112.080200 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Plain City, UT Plain City