Oceania
- American Samoa (unorganized, unincorporated territory of the United States)
- Governor -
- A. P. Lutali, Governor of American Samoa (1985–1989)
- Peter Tali Coleman, Governor of American Samoa (1989–1993)
- Governor -
- Australia
- Monarch - Elizabeth II, Queen of Australia (1952–present)
- Governor-General -
- Sir Ninian Stephen, Governor-General of Australia (1982–1989)
- Bill Hayden, Governor-General of Australia (1989–1996)
- Prime Minister - Bob Hawke, Prime Minister of Australia (1983–1991)
- Christmas Island (external territory of Australia)
- Administrator - AD. Taylor, Administrator of Christmas Island (1986-1990)
- Assembly Chairman - Alexander Donald Taylor, Chairman of the Christmas Island Assembly (1989–1990)
- Cocos (Keeling) Islands (external territory of Australia)
- Administrator - Dawn Laurie, Administrator of Cocos (Keeling) Islands (1988-1990)
- Council Chairman - Parson bin Yapat, Chairman of the Cocos Islands Council (1983-1993)
- Norfolk Island (self-governing territory of Australia)
- Administrator -
- William McFadyen Campbell, Acting Administrator of Norfolk Island (1988–1989)
- Herbert Bruce MacDonald, Administrator of Norfolk Island (1989–1992)
- Head of Government -
- John Terence Brown, President of the Legislative Assembly of Norfolk Island (1986–1989)
- David Buffett, President of the Legislative Assembly of Norfolk Island (1989–1992)
- Administrator -
- Fiji -
- President - Ratu Sir Penaia Ganilau, President of Fiji (1987–1993)
- Prime Minister - Ratu Sir Kamisese Mara, Prime Minister of Fiji (1987–1992)
- French Polynesia (French overseas territory)
- High Commissioner - Jean Montpezat, High Commissioner of the Republic in French Polynesia (1987–1992)
- President of the Government - Alexandre Léontieff, President of the Government of French Polynesia (1987–1991)
- Guam (Insular area of the United States)
- Governor - Joseph Franklin Ada, Governor of Guam (1987–1995)
- Kiribati -
- President - Ieremia Tabai, President of Kiribati (1983–1991)
- Marshall Islands -
- President - Amata Kabua, President of the Marshall Islands (1979–1996)
- Micronesia -
- President - John Haglelgam, President of Micronesia (1987–1991)
- Nauru -
- President -
- Hammer DeRoburt, President of Nauru (1986–1989)
- Kenos Aroi, President of Nauru (1989)
- Bernard Dowiyogo, President of Nauru (1989–1995)
- President -
- New Caledonia (French overseas territory)
- High Commissioner - Bernard Grasset, High Commissioner of New Caledonia (1988–1991)
- 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)
- Geoffrey Palmer, Prime Minister of New Zealand (1989–1990)
- Cook Islands (Associated state of New Zealand)
- Queen's Representative - Sir Tangaroa Tangaroa, Queen's Representative of the Cook Islands (1984–1990)
- Prime Minister -
- Pupuke Robati, Prime Minister of the Cook Islands (1987–1989)
- Geoffrey Henry, Prime Minister of the Cook Islands (1989–1999)
- Niue (associated state of New Zealand)
- Premier - Sir Robert Rex, Premier of Niue (1974–1992)
- Tokelau (dependent territory of New Zealand)
- Administrator - Neil Walter, Administrator of Tokelau (1988–1990)
- Northern Mariana Islands (Commonwealth of the United States)
- Governor - Pedro Tenorio, Governor of the Northern Mariana Islands (1982–1990)
- Palau (United Nations Trust Territory administered by the USA)
- President -
- Thomas Remengesau, Sr., Acting President of Palau (1988–1989)
- Ngiratkel Etpison, President of Palau (1989–1993)
- President -
- 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)
- Sir Ignatius Kilage, Governor-General of Papua New Guinea (1989)
- Prime Minister - Rabbie Namaliu, Prime Minister of Papua New Guinea (1988–1992)
- Pitcairn Islands (British dependent territory)
- Governor - Robin Byatt, Governor of the Pitcairn Islands (1987–1990)
- 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 George Lepping, Governor-General of the Solomon Islands (1988–1994)
- Prime Minister -
- Ezekiel Alebua, Prime Minister of the Solomon Islands (1986–1989)
- Solomon Mamaloni, Prime Minister of the Solomon Islands (1989–1993)
- Tonga
- Monarch - Tāufaʻāhau Tupou IV, King of Tonga (1965–2006)
- Prime Minister - Prince Fatafehi Tu'ipelehake, Prime Minister of Tonga (1965–1991)
- Tuvalu
- Monarch - Elizabeth II, Queen of Tuvalu (1978–present)
- Governor-General - Sir Tupua Leupena, Governor-General of Tuvalu (1986–1990)
- Prime Minister -
- Tomasi Puapua, Prime Minister of Tuvalu (1981–1989)
- Bikenibeu Paeniu, Prime Minister of Tuvalu (1989–1993)
- Vanuatu -
- President -
- Ati George Sokomanu, President of Vanuatu (1984–1989)
- Onneyn Tahi, Acting President of Vanuatu (1989)
- Frederick Karlomuana Timakata, President of Vanuatu (1989–1994)
- Prime Minister - Walter Lini, Prime Minister of Vanuatu (1979–1991)
- President -
- Wallis and Futuna (French overseas territory)
- Administrator-Superior - Roger Dumec, Administrator Superior of Wallis and Futuna (1988–1990)
- President of the Territorial Assembly -
- Manuele Lisiahi, President of the Territorial Assembly of Wallis and Futuna (1988–1989)
- Pasilio Tui, President of the Territorial Assembly of Wallis and Futuna (1989–1990)
- Western Samoa
- Head of State - Malietoa Tanumafili II, O le Ao o le Malo of Western Samoa (1962–2007)
- Prime Minister - Tofilau Eti Alesana, Prime Minister of Western Samoa (1988–1998)
Read more about this topic: List Of State Leaders In 1989