Montmoreau () is a commune in the department of Charente, southwestern France. The municipality was established on 1 January 2017 by merger of the former communes of Montmoreau-Saint-Cybard (the seat), Aignes-et-Puypéroux, Saint-Amant-de-Montmoreau, Saint-Eutrope and Saint-Laurent-de-Belzagot.
Population data refer to the commune in its geography as of January 2025.