Sir Marcus Lawrence Loane KBE (14 October 1911 – 14 April 2009) was an Australian Anglican bishop. He was the Anglican Archbishop of Sydney from 1966 to 1982 and Primate of Australia from 1977 to 1982. He was the first Australian-born Archbishop of Sydney and also the first Australian-born archbishop in the Anglican Church of Australia. He was a prolific author and his works include several biographies.