The Château de Montaigut is a castle in the French commune of Gissac in the département of Aveyron. The first traces of the Château de Montaigut date from the 10th century. Built on a rocky outcrop dominating the valley of the Dourdou de Camarès river, it defended the town of Saint-Affrique against attacks from the south. Enlarged and transformed in the 15th century by the Blanc family, it was restored several times before falling into ruin. The association Amis du château de Montaigut, which took ownership in 1968, undertook a massive restoration. The castle was finally saved in 1989.