Riverside, UT -- U.S. Census Designated Place in Utah Population (2000): 678 Housing Units (2000): 203 Land area (2000): 6.734722 sq. miles (17.442850 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 6.734722 sq. miles (17.442850 sq. km) FIPS code: 64230 Located within: Utah (UT), FIPS 49 Location: 41.806729 N, 112.140328 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Riverside, UT Riverside