Peter Irwin Cape (19 January 1926 – 30 May 1979) was a New Zealand singer, songwriter, writer and radio producer.
He is best remembered for his simple folk songs, including "Taumarunui On The Main Trunk Line", "She'll Be Right" and "Coffee Bar Blues".
He was educated by Correspondence School, and in the 1940s he went on to study for a Bachelor of Arts in English, philosophy and psychology at The University of Auckland, where he was the Craccum editor for part of 1948, and then 1949.
In the 1950s, Cape undertook theological studies at Selwyn College, after which he was ordained as an Anglican priest.
In later life Cape authored a number of books on New Zealand's contemporary visual arts and fine artists.