Auguste-Siméon Colas (29 December 1876 – 24 October 1968) was a member of Paris Foreign Missions Society and the last missionary archbishop of Archdiocese of Pondicherry. On 29 September 1930 he succeeded Archbishop Elie-Jean-Joseph Morel when the later resigned due to health reasons. He was the bishop until 28 October 1955. He was succeeded by Ambrose Rayappan.