Slanesville is an unincorporated community in northeastern Hampshire County in the U.S. state of West Virginia. Slanesville is located at the crossroads of Bloomery Pike with Slanesville Pike and Cold Stream Road. Slanesville Pike and Cold Stream Road formerly made up the Springfield Grade Road that ran from Capon Bridge to Springfield. According to the 2000 census, the Slanesville community has a population of 691.