This is a List of the Roman and Eastern Catholic dioceses in Oceania.
Because Oceania is one of the more sparsely populated areas of the world, the majority of its dioceses are located in Australia and New Zealand, although they range as far as the Midway Atoll in the Pacific Ocean to Tasmania.
Episcopal Conference of Australia
Exempt, i.e. immediately subject to the Holy See
Archdiocese of Canberra and Goulburn, covering the federal district Canberra and adjacent part of New South Wales Archdiocese of Hobart, covering Tasmania Military Ordinariate of Australia, for the armed forces Personal Ordinariate of Our Lady of the Southern Cross, with see in Maylands, Western Australia (for former Anglicans in Australia and Japan)
Ecclesiastical Province of Adelaide
Metropolitan Archdiocese of Adelaide, in South Australia
Diocese of Darwin, covering the Northern Territory
Diocese of Point Pirie, in South Australia
Ecclesiastical Province of Brisbane
(covering Queensland) Metropolitan Archdiocese of Brisbane Diocese of Cairns Diocese of Rockhampton Diocese of Toowoomba Diocese of Townsville
Ecclesiastical Province of Melbourne
(covering Victoria state) Metropolitan Archdiocese of Melbourne Diocese of Ballarat Diocese of Sale Diocese of Sandhurst Ukrainian Catholic Diocese of Saints Peter and Paul of Melbourne (Ukrainian Catholic Church Byzantine Rite Eparchy (Diocese), with cathedral see in North Melbourne, Victoria, Australia; also covers New Zealand and Oceania
Ecclesiastical Province of Perth
(covering Western Australia) Metropolitan Archdiocese of Perth, also covers Christmas Island, Cocos Islands, Heard Island and McDonald Islands Diocese of Broome Diocese of Bunbury Diocese of Geraldton
Ecclesiastical Province of Sydney
(most of New South Wales) Metropolitan Archdiocese of Sydney, also covers Norfolk Island Diocese of Armidale Diocese of Bathurst Diocese of Broken Bay Diocese of Lismore Diocese of Maitland-Newcastle Diocese of Parramatta Diocese of Wagga Wagga Diocese of Wilcannia-Forbes Diocese of Wollongong
Other Eastern dioceses
Maronite Diocese of Saint Maron of Sydney, with cathedral see in Redfern, New South Wales; immediately subject to the Maronite Patriarch of Antioch (in Lebanon; Antiochian Rite) Greek-Melkite Diocese of Saint Michael’s of Sydney, with cathedral see in Darlington, New South Wales; also covers New Zealand; immediately subject to the Melkite Patriarch of Antioch (in Syria; a Byzantine Rite) Syro-Malabar Diocese of Saint Thomas the Apostle of Melbourne, with cathedral see in Melbourne, Victoria; immediately subject to the Major Archbishop of Ernakulam–Angamaly (in India; a Syro-Oriental Rite) Chaldean Catholic Eparchy of Saint Thomas the Apostle of Sydney, with cathedral see at Bossley Park, New South Wales; also covers New Zealand; immediately subject to the Chaldean Catholic Patriarch of Babylon (in Iraq; Chaldean Rite, also Syro-Oriental)
Episcopal Conference of New Zealand
See Australia for the Chaldean Catholic, Melkite and Ukrainian Catholic dioceses competent for both countries, with sees in Sydney, Sydney viz. Melbourne cfr. infra Episcopal Conference of the [South] Pacific for three New Zealand island dependencies, notably the diocese of Raratonga (on the Cook Islands, also covering Niue) and the Mission Sui Iuris of Tokelau, both suffragans of the Metropolitan Archbishop of Suva
Exempt, i.e. Immediately subject to the Holy See
Military Ordinariate of New Zealand, for the armed forces
Ecclesiastical Province of Wellington
Metropolitan Archdiocese of Wellington
Diocese of Auckland
Diocese of Christchurch
Diocese of Dunedin
Diocese of Hamilton in New Zealand
Diocese of Palmerston North
Episcopal Conference of the Pacific
Note 1: For the Ukrainian Catholics, see Australia, under Melbourne. Note 2: The United States Minor Outlying Islands (U.S. Minor Islands) – such as Wake, Midway, Johnston, which are Unincorporated Territories of USA – are administered by the Archdiocese for the Military Services of the United States at Washington, D.C. Note 3: Honolulu (on and for Hawaii) is a suffragan diocese in the ecclesiastical Province of San Francisco (California, USA).