Haami Tokouru Ratana (21 July 1894 – 30 October 1944) was a New Zealand politician and president of the Rātana Church.

After enlisting in the New Zealand Pioneer Battalion during World War I, he served in Gallipoli and later in France, where he suffered the effects of a gas attack.

During the Second World War, Toko Ratana was opposed to conscription but wished to have a home guard manned by Māori to defend their lands.

As Kai-Arahi or leader of the Ratana Church, he made a public declaration of the church's support for the war, and supported Māori control over Māori contributions to the war.

He was succeeded both as MP for Western Maori and Ratana Church President by his younger brother, Matiu Rātana.