Le Fleix is a village in the south-west of France it is located in the Aquitaine region and in the Dordogne département.

Le Fleix is on the edge of the Dordogne river at a place where the river bends. This is likely the origin of the name "flexus".

There are currently approximately 1,200 inhabitants, a number that has gone largely unchanged since the Middle Ages.

Le Fleix is famous for a peace treaty signed there in 1580.

There were once two castles in Le Fleix, the Old Castle, which was destroyed, and the New Castle built in the 17th century as a residence for Frédéric de Foix. It was sold during the French Revolution, and became a Protestant church in 1805.

The harbour is active in the timber and wine trades. The economy, once based on the river, is now primarily viticultural.