Tamati Ellison (born 1 April 1983 in Wellington, New Zealand) is a New Zealand rugby union footballer who plays for the Rebels in Super Rugby and Otago in the ITM Cup.
Ellison made his debut for the Wellington Lions in the 2003 NPC final defeat against Auckland. He also captained the Lions during the 2007 Air New Zealand Cup, leading them to the final where they were once again defeated by Auckland. He was named as Wellington's Player of the Year for 2007.
He made his Super Rugby debut in 2005 for the Blues after being called into their squad as an injury replacement and appearing as a substitute in their final match of the season against the New South Wales Waratahs. He made his Hurricanes debut in 2006 and went on to make 10 appearances that season, all coming from the bench. His run-on debut came against the Chiefs in 2007. He made his 50th Super Rugby appearance during the 2010 season.