La Souche (French pronunciation: [la suʃ]; Occitan: La Socha) is a commune in the Ardèche department in southern France.

The commune is located in the Parc naturel régional des Monts d'Ardèche 15 km (9.3 mi) east of Aubenas; its main hamlets are located on the right bank of the river Lignon, which rises in the commune's western part, then flows east through the commune.

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