Ngāti Rongoū is a Māori iwi (tribe) of the Coromandel Peninsula in New Zealand. It is one of five tribes of the Marutūāhu confederation, the others being Ngāti Maru, Ngāti Paoa, Ngāti Whanaunga and Ngāti Tamaterā. The Marutūāhu tribes are all descended from Marutūāhu, a son of Hotunui, who is said to have arrived in New Zealand on the Tainui canoe. The Marutūāhu tribes are therefore part of the Tainui group of tribes. The Marutūāhu confederation is also part of the Hauraki collective of tribes.