Oceania
- American Samoa (unorganized, unincorporated territory of the United States)
- Governor - A. P. Lutali, Governor of American Samoa (1985–1989)
- Australia
- Monarch - Elizabeth II, Queen of Australia (1952–present)
- Governor-General - Sir Ninian Stephen, Governor-General of Australia (1982–1989)
- Prime Minister - Bob Hawke, Prime Minister of Australia (1983–1991)
- Christmas Island (external territory of Australia)
- Administrator -
- Tom F. Paterson, Administrator of Christmas Island (1983-1986)
- C. Stephens, Acting Administrator of Christmas Island (1986)
- AD. Taylor, Administrator of Christmas Island (1986-1990)
- Assembly Chairman - Gordon Bennett, Chairman of the Christmas Island Assembly (1985–1988)
- Administrator -
- Cocos (Keeling) Islands (external territory of Australia)
- Administrator - Carolyn Stuart, Administrator of Cocos (Keeling) Islands (1985-1987)
- Council Chairman - Parson bin Yapat, Chairman of the Cocos Islands Council (1983-1993)
- Norfolk Island (self-governing territory of Australia)
- Administrator - John Alexander Matthew, Administrator of Norfolk Island (1985–1988)
- Head of Government -
- David Buffett, Chief Minister of Norfolk Island (1979–1986)
- John Terence Brown, President of the Legislative Assembly of Norfolk Island (1986–1989)
- Fiji -
- Monarch - Elizabeth II, Queen of Fiji (1970–1987)
- Governor General - Ratu Sir Penaia Ganilau, Governor-General of Fiji (1983–1987)
- Prime Minister - Ratu Sir Kamisese Mara, Prime Minister of Fiji (1967–1987)
- French Polynesia (French overseas territory)
- High Commissioner -
- Bernard Gérard, High Commissioner of the Republic in French Polynesia (1985–1986)
- Pierre Angeli, High Commissioner of the Republic in French Polynesia (1986–1987)
- President of the Government - Gaston Flosse, President of the Government of French Polynesia (1984–1987)
- High Commissioner -
- Guam (Insular area of the United States)
- Governor - Ricardo Bordallo, Governor of Guam (1983–1987)
- Kiribati -
- President - Ieremia Tabai, President of Kiribati (1983–1991)
- Marshall Islands
- gained independence on 21 October 1986, previously part of the Trust Territory of the Pacific Islands
- President - Amata Kabua, President of the Marshall Islands (1979–1996)
- Micronesia
- gained independence on 3 November 1986, previously part of the Trust Territory of the Pacific Islands
- President - Tosiwo Nakayama, President of Micronesia (1979–1987)
- Nauru -
- President -
- Hammer DeRoburt, President of Nauru (1978–1986)
- Kennan Adeang, President of Nauru (1986)
- Hammer DeRoburt, President of Nauru (1986)
- Kennan Adeang, President of Nauru (1986)
- Hammer DeRoburt, President of Nauru (1986–1989)
- President -
- New Caledonia (French overseas territory)
- High Commissioner -
- Fernand Wibaux, High Commissioner of New Caledonia (1985–1986)
- Bernard Lemaire, Acting High Commissioner of New Caledonia (1986)
- Jean Montpezat, High Commissioner of New Caledonia (1986–1987)
- President of the Government - Dick Ukeiwé, President of the Executive Council of New Caledonia (1984–1988)
- High Commissioner -
- New Zealand
- Monarch - Elizabeth II, Queen of New Zealand (1952–present)
- Governor-General - Sir Paul Reeves, Governor-General of New Zealand (1985–1990)
- Prime Minister - David Lange, Prime Minister of New Zealand (1984–1989)
- Cook Islands (Associated state of New Zealand)
- Queen's Representative - Tangaroa Tangaroa, Queen's Representative of the Cook Islands (1984–1990)
- Prime Minister - Tom Davis, Prime Minister of the Cook Islands (1983–1987)
- Niue (associated state of New Zealand)
- Premier - Sir Robert Rex, Premier of Niue (1974–1992)
- Tokelau (dependent territory of New Zealand)
- Administrator - Harold Huyton Francis, Administrator of Tokelau (1984–1988)
- Papua New Guinea
- Monarch - Elizabeth II, Queen of Papua New Guinea (1975–present)
- Governor-General - Sir Kingsford Dibela, Governor-General of Papua New Guinea (1983–1989)
- Prime Minister - Paias Wingti, Prime Minister of Papua New Guinea (1985–1988)
- Pitcairn Islands (British dependent territory)
- Governor - Terence Daniel O'Leary, Governor of the Pitcairn Islands (1984–1987)
- Magistrate - Brian Young, Magistrate of the Pitcairn Islands (1984–1991)
- Solomon Islands -
- Monarch - Elizabeth II, Queen of the Solomon Islands (1978–present)
- Governor-General - Sir Baddeley Devesi, Governor-General of the Solomon Islands (1978–1988)
- Prime Minister -
- Peter Kenilorea, Prime Minister of the Solomon Islands (1984–1986)
- Ezekiel Alebua, Prime Minister of the Solomon Islands (1986–1989)
- Tonga
- Monarch - Tāufaʻāhau Tupou IV, King of Tonga (1965–2006)
- Prime Minister - Prince Fatafehi Tu'ipelehake, Prime Minister of Tonga (1965–1991)
- Trust Territory of the Pacific Islands (UN Trust Territory administered by the United States)
- High Commissioner - Janet J. McCoy, High Commissioner of the Trust Territory of the Pacific Islands (1981–1987)
- Northern Mariana Islands (Commonwealth of the United States from 4 November 1986)
- Governor - Pedro Tenorio, Governor of the Northern Mariana Islands (1982–1990)
- Palau (autonomous territory)
- President - Lazarus Salii, President of Palau (1985–1988)
- Tuvalu
- Monarch - Elizabeth II, Queen of Tuvalu (1978–present)
- Governor-General -
- Sir Fiatau Penitala Teo, Governor-General of Tuvalu (1978–1986)
- Sir Tupua Leupena, Governor-General of Tuvalu (1986–1990)
- Prime Minister - Tomasi Puapua, Prime Minister of Tuvalu (1981–1989)
- Vanuatu -
- President - Ati George Sokomanu, President of Vanuatu (1984–1989)
- Prime Minister - Walter Lini, Prime Minister of Vanuatu (1979–1991)
- Wallis and Futuna (French overseas territory)
- Administrator-Superior -
- Bernard Lesterlin, Administrator Superior of Wallis and Futuna (1985–1986)
- Jacques Le Hénaff, Administrator Superior of Wallis and Futuna (1986–1987)
- President of the Territorial Assembly -
- Falakiko Gata, President of the Territorial Assembly of Wallis and Futuna (1984–1986)
- Petelo Takatai, President of the Territorial Assembly of Wallis and Futuna (1986–1987)
- Administrator-Superior -
- Western Samoa
- Head of State - Malietoa Tanumafili II, O le Ao o le Malo of Western Samoa (1962–2007)
- Prime Minister - Va'ai Kolone, Prime Minister of Western Samoa (1985–1988)
Read more about this topic: List Of State Leaders In 1986