Enon is a village in Clark County, Ohio, United States. The population was 2,638 at the 2000 census. It is part of the Springfield, Ohio Metropolitan Statistical Area. Enon is the headquarters of the Speedway SuperAmerica gas station chain. The Enon Mound, Ohio's second largest conical Indian burial mound, is located in Enon. This mound is believed to have been built by the Adena culture.