John Cyril "Jack" Cato (4 April 1889 – 14 August 1971) was an Australian portrait photographer in the Pictorialist style, operating in the first half of the twentieth century. He was the author of the first history of Australian photography; The Story of the Camera in Australia (1955).
- I Can Take It: The Autobiography of a Photographer, Melbourne: Georgian House, 1947.
- The Story of the Camera in Australia, Melbourne: Georgian House, 1955.
- I. Cosier, Jack Cato, University of Melbourne, 1980 (M.A. thesis).