Farmerville is a town in and the parish seat of Union Parish, Louisiana, United States. It has also been known as Farmersville. As of the 2020 census, Farmerville had a population of 3,366. It is part of the Monroe Metropolitan Statistical Area. The town is spread about Lake D'Arbonne, a popular fishing and boating waterway.
According to the United States Census Bureau, the town has a total area of , of which is land and (0.72%) is water.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Farmerville has a humid subtropical climate, abbreviated "Cfa" on climate maps.
On December 13, 2022, the northern part of the town was struck by an EF3 tornado that damaged or destroyed structures and injured 14 people. The tornado caused $1.2 million in damage, with most of the damage coming from the town.
As of the 2020 United States census, there were 3,366 people, 954 households, and 552 families residing in the town.
The Union Parish School District covers education in the Farmerville area.