Tournon-d'Agenais (French pronunciation: [tuʁnɔ̃ daʒ(ə)nɛ], literally Tournon of Agenais; Occitan: Tornon d'Agenés) is a commune in the Lot-et-Garonne department in south-western France.

In the center of the square there is also the town hall, which was a symbol of a major struggle during the Middle Ages for an ample supply of water.

The castle of Tournon d'Agenais was destroyed in 1212, noted by the English in 1283 and played an important role during the Hundred Year War.

The Récollets convent was built in the 17th century on the ruins of the old Château de Tournon, in order to revive the Catholic religion after the departure of the Protestants.

On 3 July 1944, 1,500 men of the Panzergrenadier division "das Gepent" coming from Cahors and heading towards Villeneuve-sur-Lot, fired on the few resistance fighters present at Place du Foirail.