Gaston Marie Jacquier (23 February 1904 – 8 July 1976) was a French prelate of the Catholic Church in Algeria. Originally from Évian-les-Bains, France, he moved to French Algeria and was ordained a priest of the Archdiocese of Algiers. In 1960, he was appointed Auxiliary Bishop of Algiers. He participated in all four sessions of the Second Vatican Council. In 1976, he was assassinated with a knife on a street in Algiers.