Te Hangi signed the Waitangi sheet of the Treaty of Waitangi on 9 July 1840 in Tāmaki (Auckland), possibly at Karaka Bay. He may have been a Ngāti Pāoa rangatira (chief).
He was from the Coromandel area. In 1876 he was recorded as being 55 years old and living in Auckland. Te Hangi had at least six wives.