Iriaka Matiu Rātana OBE (née Te Rio; 25 February 1905 – 21 December 1981) was a New Zealand politician and Rātana morehu who won the Western Maori electorate for Labour in 1949. She succeeded her husband Matiu Rātana to become the first woman to represent Māori in the New Zealand Parliament. She held the electorate until her retirement in 1969.