Castle Valley, UT -- U.S. town in Utah Population (2000): 349 Housing Units (2000): 230 Land area (2000): 8.082417 sq. miles (20.933364 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 8.082417 sq. miles (20.933364 sq. km) FIPS code: 11000 Located within: Utah (UT), FIPS 49 Location: 38.634367 N, 109.410558 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Castle Valley, UT Castle Valley