Sean Wainui (born 23 October 1995) is a New Zealand rugby union player. He plays in the centre (and occasionally wing) position for provincial side Taranaki and for New Zealand's m?ori international side the M?ori All Blacks.
Wainui was a member of the Takapuna Grammar School 1st XV in 2011, 2012 and 2013. He was awarded North Harbour's 2013 M?ori Colts Senior Player of the Year whilst still in school.
Upon leaving school, Wainui was contracted by the Taranaki Rugby Football Union. In his first year out of school he was apart of Taranaki's 2014 national provincial championship squad. He was spotted by coach Colin Cooper and had signed with Taranaki at just 18-years-old after an impressive season, not only for his New Plymouth Old Boys club but for the Chiefs development side also. Wainui made his debut for Taranaki in the 2014 ITM Cup competition, coming on as a replacement against Waikato.