Ngātiwai or Ngāti Wai is a Māori iwi of the east coast of the Northland Region of New Zealand. Its historical tribal area or rohe stretched from Cape Brett in the north to Takatū Point on Tawharanui Peninsula in the south and out to Great Barrier Island, the Poor Knights Islands and other offshore islands. Descendants of Ngātiwai include brothers Jim, Ian and Winston Peters, artist Shona Rapira Davies, and writer Paula Morris.