Sir Arnold Henry Nordmeyer was a New Zealand politician and Presbyterian minister. As a member of Parliament (MP) he played a crucial role in the Labour Party, serving from 1935 to 1969. He served as minister of finance (1957–1960) and later as leader of the Labour Party and leader of the Opposition (1963–1965). Although he was a prominent statesman, Nordmeyer never ascended to the role of prime minister.