Matiu is both a given name and a surname. It is a Māori transliteration of the name Matthew. Notable people with the name include:
Given name
Matiu Dickson (1952–2016), New Zealand lawyer, teacher, academic, politician, and activist Matiu Parakatone Tahu (?–1863/64?), New Zealand tribal tohunga and mission teacher Matiu Rata (1934–1997), New Zealand politician Matiu Rātana (1912–1949), New Zealand politician Matiu Ratana (police officer) (1966–2020), New Zealand-born British police officer and murder victim Matiu Te Auripo Te Hau (1912–1978), New Zealand teacher, educationalist, and community leader Matiu Te Rei (born 1948), Māori leader Matiu Walters, New Zealand singer and musician
Surname
Legi Matiu (born 1969), New Zealand-born French rugby union player
Stage name
Matiu (musician) (born 1986), Innu singer-songwriter