Siale Piutau (born 13 October 1985) is a New Zealand-born Tongan rugby union player who plays at centre. Although born and educated in New Zealand, he represented Tonga internationally from 2011 to 2019. He is the elder brother of New Zealand player Charles Piutau. Piutau was selected as Tonga's captain for the 2019 Rugby World Cup and announced his retirement from international rugby, after a win against the USA.