Saint-Mars-de-Coutais (French pronunciation: [sɛ̃ maʁ də kutɛ] ⓘ; Breton: Sant-Marzh-ar-C'hoad) is a commune in the Loire-Atlantique department in western France.

[3] Gare de Port-Saint-Père-Saint-Mars is served by train services between Pornic, Saint-Gilles-Croix-de-Vie and Nantes.

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