In common usage, Spanish Valley typically refers to the geographic valley that extends south of the city of Moab, most of which lies within Grand County, the northern neighbor of San Juan County.

Maps of the area, for example, label the whole valley—not just the portion in San Juan County—as Spanish Valley.

According to the U.S. Census Bureau, the CDP has a total area of 14.3 square miles (36.9 km2), all land.

Returns from the 2010 census show that 491 people resided in the CDP that year.

American Community Survey data from between 2013 and 2017 indicates that the area had 185 housing units.