  castle valley is a town in grand county, utah, united states. the population was 319 at the 2010 census. the town is about 16 miles northeast of moab near state route 128. ==geography== according to the united states census bureau, the town has a total area of 8.1&nbsp;square miles (20.9&nbsp;kmÂ²), all of it land. ==demographics==  at the time of the 2010 census, there were 319 people residing in town, at the time of the 2000 census, there were 349 people, 158 households and 85 families residing in the town. the population density was 39.4 per square mile (15.2/kmÂ²). in 2
Towns_in_Utah