The common Agnac, Canton de Lauzun, is located north of Lot-et-Garonne and borders of the Dordogne. It is mainly for agricultural purposes.
For the origin of the name Agnac, there are two assumptions:
- Agnac comes from the name of a Gallo-Roman Annius
- Agnac comes from the Latin meaning Agni Agua Water lamb
Agnac is formed by the union of two parishes that were before the concordat signed July 15, 1801: Agnac and Iffour.
On the common Agnac that the station was built in La Sauvetat du Dropt, which, between 1886 and 1953, had a certain animation served as 3 trains daily in both directions, Bordeaux, Bergerac and Marmande. The "Impudents, novel published in 1943, in which Marguerite Duras evokes the Lot-et-Garonne, recounts what happened rail.