Mananui Te Heuheu Tukino II (? – 7 May 1846) was a notable New Zealand tribal leader. Of Māori descent, he identified with the Ngāti Tūwharetoa iwi. The eldest son of Herea Te Heuheu Tukino I and his first wife, Rangiaho of Ngati Maniapoto, he was born in , King Country, New Zealand, near the Mangatutu Stream and was the second of the Te Heuheu line to assume the leadership of Ngati Tuwharetoa. Mananui traced his ancestry to Tama-te-kapua, commander of Te Arawa canoe, and to its priest, Ngatoro-i-rangi; and was distantly related to Potatau Te Wherowhero of Waikato and Te Rauparaha of Ngati Toa. He belonged to Ngati Pehi (now Ngati Turumakina), Ngati Hukere and Ngati Hinewai hapu, and in his youth lived at Pamotumotu.