The Château de Chalmazel is a castle situated in the commune of Chalmazel, in the Loire département of France. It is located in the Haut-Forez, between the towns of Saint-Étienne and Thiers. Its name in medieval times was Saint-Jehan-des-Neiges. The castle dominates the valley of the Lignon and it was built to be an impregnable fortress on the instructions of the Count of Forez.