Blacksville is a town in Monongalia County, West Virginia, USA. The population was 175 at the 2000 census. It is included in the Morgantown, West Virginia Metropolitan Statistical Area.
Blacksville is located at 39°43′12″N 80°12′45″W / 39.72°N 80.2125°W / 39.72; -80.2125 (39.720036, -80.212562).
According to the United States Census Bureau, the town has a total area of 0.3 square miles (0.8 km²), all land.