Le Fief-Sauvin () is a former commune in the Maine-et-Loire department in western France.
The river ÃÂvre forms all of the commune's eastern border.
On 15 December 2015, La Boissière-sur-ÃÂvre, Chaudron-en-Mauges, La Chaussaire, Le Fief-Sauvin, Le Fuilet, Montrevault, Le Puiset-Doré, Saint-Pierre-Montlimart, Saint-Quentin-en-Mauges, Saint-Rémy-en-Mauges and La Salle-et-Chapelle-Aubry merged becoming one commune called Montrevault-sur-ÃÂvre.