Saint-Jouan-des-Guérets (French pronunciation: [sɛ̃ ʒwɑ̃ de ɡeʁɛ]; Breton: Sant-Yowan-an-Havreg) is a commune in the Ille-et-Vilaine department of Brittany in northwestern France.

Inhabitants of Saint-Jouan-des-Guérets are called jouannais in French.

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