Salt Rock (also Saltrock) is a census-designated place (CDP) in southern Cabell County, West Virginia, United States. As of the 2020 census, its population was 373 (down from 388 at the 2010 census). It lies along West Virginia Route 10 southeast of the city of Huntington, the county seat of Cabell County. Its elevation is 581 feet (177 m). Although Salt Rock is unincorporated, it has a post office, with the ZIP Code of 25559.