fairmont wv is in what county
Fairmont is a city in Marion County, West Virginia, United States. Nicknamed The Friendly City. The population was 19,097 at the 2000 census. It is the county seat of Marion County. Fairmont is located at 39Â°28â²53â³N 80Â°8â²36â³W / 39.48139Â°N 80.14333Â°W / 39.48139; -80.14333 (39.481253, -80.143453). The Tygart Valley River and the West Fork River join in Fairmont to form the Monongahela River.