Rock Hill is an unincorporated community and census-designated place (CDP) in Grant Parish, Louisiana, United States. As of the 2020 census, Rock Hill had a population of 260.
Rock Hill is located in southwestern Grant Parish along U.S. Route 71, which leads northwest to Colfax, the parish seat, and southeast to Alexandria. According to the U.S. Census Bureau, the Rock Hill CDP has a total area of , of which , or 0.06%, is water.
Rock Hill was first listed as a census designated place in the 2010 U.S. census.