Jacinta Arianna Ruru MNZM FRSNZ (born 1974) is a New Zealand academic and the first Māori professor of law.

[4] Ruru's research centres on indigenous peoples' (primarily Māori in New Zealand and First Nations in Canada) legal relations with land and water.

[5][6][7] She is the co-director of Ngā Pae o te Māramatanga (NPM) the New Zealand's Māori Centre of Research Excellence (CoRE).

[8][9] In addition to winning the Prime Minister's supreme award for tertiary teaching,[10] Ruru has also been made a Fellow of the Royal Society of New Zealand.

[16][17] In 2024, during a radio interview on Waatea News, Dale Husband intimated that Ruru could be considered by some "an enemy of the state" due to her work decolonising New Zealand law.