The United States Census Bureau defines Spanish Valley as a census-designated place (CDP) in San Juan County, Utah, United States. 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 entire sum valley—not just the portion in San Juan County—as Spanish Valley.
Spanish Valley is located at 38°29′17″N 109°26′15″W / 38.48806°N 109.43750°W / 38.48806; -109.43750 (38.487944, -109.437460).
According to the U.S. Census Bureau, the CDP has a total area of 14.3 square miles (36.9 km2), all land.