Saint-Martin-sous-Vigouroux (French pronunciation: [sɛ̃ maʁtɛ̃ su viɡuʁu]; Auvergnat: Sant Martin jos Vigron) is a commune in the Cantal department in south-central France.

It is located at the southern tip of the 'Parc naturel régional des Volcans d'Auvergne' (Auvergne regional natural park).

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