Farmington is a town in Marion County, West Virginia, United States. The population was 387 at the 2000 census. It is best known for being the site of the 1968 Farmington Mine disaster.
Farmington is located at 39°30′47″N 80°15′7″W / 39.51306°N 80.25194°W / 39.51306; -80.25194 (39.512979, -80.252060).
According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.1 km²), all land.