Carbon Hill is an unincorporated community and census-designated place (CDP) in central Ward Township, Hocking County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code of 43111. As of the 2010 census the population of the CDP was 233.
State Route 278, located on the western edge of Carbon Hill, is its main north-south street. It is 3 miles (5 km) north of Nelsonville.