Maria Violeta Marcos, (born Maria Remedios Sebastian Marcos; July 18, 1937 – April 30, 2001) was a Filipino Roman Catholic nun. She was best known as the co-founder and first director of the Augustinian Missionaries of the Philippines, and for her contributions to the resistance in opposition to the martial Law dictatorship of Ferdinand Marcos - first through her diocesan social action involvements in Negros Occidental, and later as part of the human rights organization Task Force Detainees of the Philippines.