Saint-Gilles-Vieux-Marché (French pronunciation: [sɛ̃ ʒil vjø maʁʃe]; Breton: Sant-Jili-ar-C'hozhvarc'had) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

People from Saint-Gilles-Vieux-Marché are called saint-gillois in French.

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