Farmington is a town in Marion County, West Virginia, United States. The population was 375 at the 2010 census. It is best known for being the site of the 1968 Farmington Mine disaster.
The community was named for the fact a large share of the first settlers were farmers.
Farmington is located at 39°30′47″N 80°15′7″W (39.512979, -80.252060), along Buffalo Creek.
According to the United States Census Bureau, the town has a total area of 0.43 square miles (1.11 km2), of which 0.42 square miles (1.09 km2) is land and 0.01 square miles (0.03 km2) is water.
As of the census of 2010, there were 375 people, 163 households, and 111 families living in the town. The population density was 892.9 inhabitants per square mile (344.8/km2). There were 192 housing units at an average density of 457.1 per square mile (176.5/km2). The racial makeup of the town was 97.9% White, 0.3% Asian, and 1.9% from two or more races. Hispanic or Latino of any race were 0.3% of the population.
There were 163 households, of which 30.7% had children under the age of 18 living with them, 51.5% were married couples living together, 9.8% had a female householder with no husband present, 6.7% had a male householder with no wife present, and 31.9% were non-families. 28.8% of all households were made up of individuals, and 13.5% had someone living alone who was 65 years of age or older.