Helenwood is an unincorporated community in Scott County, Tennessee, United States. The population was 846 at the 2000 census, when Helenwood was treated as an incorporated municipality. For the 2010 census, it was a census designated place (CDP) with a population of 865.
Helenwood was platted in 1859 under the name "Homestead." It was settled as a coal-mining community. The origin of its current name is not known.
On April 5, 1935 a dynamite explosion caused extensive damage in Helenwood, destroying fifteen homes and damaging many other homes and businesses. One news account said that Helenwood was "literally wiped off the map." There were no fatalities.