Tengku Maimun binti Tuan Mat (Jawi: تڠكو ميمون توان مت; born 2 July 1959) is a Malaysian lawyer who has served as the 10th Chief Justice of Malaysia since May 2019. She is the first woman to ascend to the highest judicial office of the country. Tengku Maimun was announced as Malaysia's new Chief Justice, succeeding Richard Malanjum who retired in April 2019, in a statement released by the Prime Minister's Department on 2 May 2019.