Tainui may refer to: Tainui, a confederation of Māori iwi (tribes) in New Zealand Waikato Tainui, often referred to as "Tainui", a constituent tribe of the abovementioned confederation Tainui, a Māori name for the shrub Pomaderris apetala Tainui (canoe), a Māori waka (migration canoe) Tainui, New Zealand, a suburb of Dunedin Tainui (New Zealand electorate), a former parliamentary Māori electorate. SS Tainui, a Royal Navy cargo ship that was torpedoed in 1918