Vaillac (French pronunciation: [vajak]; Languedocien: Valhac) is a former commune in the Lot department in south-western France. On 1 January 2016, it was merged into the new commune of Cœur de Causse.

The village lies in the middle of the commune, in the valley of the Foulon, a stream tributary of the Céou, which flows westward through the northern part of the commune. There is a castle on the hill overlooking the village that is occasionally open to the public.

• The Château de Vaillac is a castle containing elements from the 14th, 15th, 16th and 17th centuries.
• Église Saint-Julien, 14th - 15th century church

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  Château de Vaillac.
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  Vie of the church and the village.
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  Foulon brook.

• Communes of the Lot department