List of predecessors of sovereign states in Oceania
This is a list of all present sovereign states in Oceania and their predecessors. The region of Oceania is generally defined geographically to include the subregions of Australasia, Melanesia, Micronesia and Polynesia, and their respective sovereign states.
Oceania was originally colonised by Europeans with Australia and New Zealand primarily by the British, and the Pacific Islands primarily by the British, French and Dutch. Today, Oceania consists of fourteen sovereign states of various government types, the most common consisting of parliamentary systems.
| Sovereign state | Predecessors |
| Australia | British Colonial Period ' |
| Fiji | Kingdom of Fiji Colony of Fiji Dominion of Fiji ' |
| Kiribati | Gilbert and Ellice Islands ' |
| Marshall Islands | German New Guinea South Pacific Mandate Trust Territory of the Pacific Islands ' ' |
| Federated States of Micronesia | Spanish East Indies German New Guinea South Pacific Mandate Trust Territory of the Pacific Islands ' ' |
| Nauru | German New Guinea ' Nauru ' Japanese occupation of Nauru Nauru ' ' |
| New Zealand | Colony of New South Wales ' Colony of New Zealand Dominion of New Zealand ' |
| Palau | Spanish East Indies German New Guinea South Pacific Mandate Trust Territory of the Pacific Islands ' |
| Papua New Guinea | Territory of Papua and German New Guinea, later Territory of New Guinea ' Territory of Papua and New Guinea ' ' |
| Samoa | German Samoa Western Samoa Trust Territory ' ' |
| Solomon Islands | German New Guinea ' British Solomon Islands ' |
| Tonga | ' ' |
| Tuvalu | Gilbert and Ellice Islands ' ' |
| Vanuatu | Anglo-French Joint Naval Commission Independent Commune of Franceville Anglo-French Joint Naval Commission New Hebrides Condominium ' |