General Trần Thiện Khiêm (born 15 December 1925) was an officer in the Army of the Republic of Vietnam during the Vietnam War. During the 1960s he was involved in several coups. He helped President Ngô Đình Diệm put down a November 1960 coup attempt and was rewarded with promotion. In 1963 he was involved in the coup that deposed and assassinated Diêm.