|Coronation||8 October 1933|
|Reign||8 October 1933 – 18 May 1966|
|Father||Te Rata Mahuta|
|Mother||Te Uranga Matai|
|Spouse||Te Atairangikaahu Hērangi|
|Born||June 16, 1906 at Waahi, Huntly|
|Died||May 18, 1966(aged 59)|
Korokī Te Rata Mahuta Tāwhiao Pōtatau Te Wherowhero (16 June 1906 - 18 May 1966) was the fifth Māori King. He was the elder son of the fourth Māori King, Te Rata Mahuta, and Te Uranga Matai of the Ngāti Korokī tribe. He was named Korokī after the ancestor of his mother's tribe.
Korokī had a relationship with Te Paea Raihe, probably in the 1920s, and they had two daughters. In about 1930 Te Puea Herangi arranged for him to marry her niece Te Atairangikaahu, the daughter of her brother Wanakore Herangi. Te Atairangikaahu had a daughter, Piki, born in 1931. They adopted a son, Robert Mahuta, in 1939. Korokī and his family lived at Waahi.
Korokī's father died on 1 October 1933, when Korokī was just 24. He was chosen to succeed his father as king and accepted reluctantly. He was crowned on 8 October 1933, the day of his father's funeral.
In his first few years as king, he was closely supervised by his father's brothers Tumate and Tonga Mahuta, and Haunui Tawhiao, brother of his grandfather King Mahuta. Two of his main confidants and supporters were Pei Te Hurinui Jones and Piri Poutapu. On 30 December 1953 he received Queen Elizabeth II when she called at his official residence at Tūrangawaewae marae at Ngaruawahia during the coronation tour.
He died at Ngaruawahia on 18 May 1966 and was buried on Mount Taupiri on 23 May. He was succeeded by Piki, who was given her mother's name of Te Atairangikaahu at her coronation.
- Ballara, Angela. "Koroki Te Rata Mahuta Tawhiao Potatau Te Wherowhero 1908/1909? - 1966". Dictionary of New Zealand Biography. Ministry for Culture and Heritage. Retrieved 4 April 2011.
- Ballara, Angela (1 September 2010). "Te Rata Mahuta Potatau Te Wherowhero". Dictionary of New Zealand Biography. Ministry for Culture and Heritage. Retrieved 13 May 2012.
1933 – 1966