Haami Tokouru Ratana is a former New Zealand politician and President of the Ratana Church. He joined Eruera Tirikatene in Parliament as the second Ratana Independent Member of Parliament (MP), elected for the Western Māori electorate in 1935. Following the death of his father Tahupotiki Wiremu Ratana in 1939, H.T Ratana became the second Ratana movement President. He held both positions until his death in 1944.
Eldest son of the founder of the Ratana Church, Toko Ratana was educated at Whangaehu school and was bilingual in English and Maori. After enlisting in the New Zealand Pioneer Battalion during World War One, he served in Gallipoli and later in France, where he suffered the effects of a gas attack. This caused him ill health for the rest of his life.
H. T. Ratana unsuccessfully stood for Parliament as an independent candidate for the Western Maori seat against Maui Pomare in 1922. As a Ratana Independent candidate and one of the 'first cut of the body of the mangai', he stood against Pomare again in 1928, and against Taite Te Tomo in 1931. He was elected in 1935, joining fellow Ratana MP Eruera Tirikatene. In 1936, he joined the Labour Party as the Ratana Movement and Labour formed a political alliance. He was re-elected in 1938 and 1943.