Montignac-Lascaux, is a commune in the Dordogne department, Nouvelle-Aquitaine, Southwestern France. It is a small town situated on the Vézère river and has been the capital of the canton of Montignac since 1790. In 2015 it became the capital of the newly created Canton de la Vallée de l'Homme. The poet Pierre Lachambeaudie (1806–1872) was born in the village.

The Vézère is a 211-km-long river in southwestern France. It is an important tributary to the Dordogne. Its source is in the northwestern part of the elevated plateau known as the Massif Central. It flows into the Dordogne from the right near Le Bugue. The river Corrèze is a tributary of the Vézère.