The Eyre is a coastal river that flows through the Landes of Gascony, in Aquitaine, southwest France.

The river is generally presented as the confluence of: The combined watercourse Eyre-Grande Leyre is 115.9 km (72.0 mi) long.

It can be found in such names as Eyres-Moncube, Landes, or the craste de l'Eyron (Eyron ditch) in Lacanau, Gironde.

It flows north into the Bassin d'Arcachon, a large bay on the Atlantic coast, in the Pays de Buch, Gironde.

It rises between Luxey and Retjons, in Landes, and flows northwest to join the Grande Leyre downstream from Pissos.