The Anglican Diocese of North West Australia (known as the Anglican Diocese of Northern Australia until 1961) is a diocese of the Anglican Church of Australia, founded in 1910. It is situated in the northern part of the state of Western Australia, Australia. As part of the Province of Western Australia, it covers those parts of the state north of Perth including Geraldton, Karratha and Broome and is geographically the largest Anglican diocese in Australia and the largest land-based diocese in the world. The diocese has 18 parishes and three Mission to Seafarers’ ministries; the cathedral church of the diocese is the Cathedral of the Holy Cross, Geraldton.