Saint-Benoît-des-Ondes (French pronunciation: [sɛ̃ bənwa de.z‿ɔ̃d]; Breton: Lanwezoù) is a commune in the Ille-et-Vilaine Department in Brittany in northwestern France.

Inhabitants of Saint-Benoît-des-Ondes are called bénédictins in French.

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