Setareki "Seta" Tamanivalu (born 23 July 1992 in Lautoka) is a Fijian-born rugby union player who plays for Taranaki. He was the 2014 ITM Player of the Year.
Tamanivalu was born and raised in Fiji. He attended Lelean Memorial School where he excelled in both rugby union and rugby league. He was a member of the Fiji Secondary Schools Under 18 rugby league squad that toured Australia in 2010. He later migrated to New Zealand where he gained a scholarship at Saint Kentigern College to play rugby.
In 2012, Tamanivalu started his professional rugby career when he was named in the Taranaki squad for the 2012 ITM Cup.