Montaigu-Vendée is a commune. It is found in the region Pays de la Loire in the Vendée department in the west of France. The municipality was created on 1 January 2019 and consists of the former communes of Montaigu (the seat), Boufféré, La Guyonnière, Saint-Georges-de-Montaigu and Saint-Hilaire-de-Loulay.