Sixto Soria Savigne (born April 27, 1954 in Santiago de Cuba) is a Cuban boxer, who won the silver medal in the men's Light Heavyweight (81 kg) category at the 1976 Summer Olympics in Montreal. As the top favourite he lost in a close fight to Leon Spinks of USA. Two years later he captured the world title at the second World Championships in Belgrade. He lost in the quarter-finals of the 1979 Pan American Games to American Tony Tucker.