Kopperston (also Kopperstone) is a census-designated place (CDP) in Wyoming County, West Virginia, United States. Its elevation is . Kopperston once had a post office, which closed on March 10, 2007. As of the 2020 census, its population was 569.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Kopperston has a humid subtropical climate, abbreviated "Cfa" on climate maps.