List of sovereign states and dependent territories in Oceania
This is a list of sovereign states and dependent territories in the geopolitical region of Oceania. Although it is mostly ocean and spans many continental plates, Oceania is occasionally listed as one of the continents.
This list follows the boundaries of geopolitical Oceania, which includes Australasia, Melanesia, Micronesia and Polynesia. The main continental landmass of Oceania is Australia.
The boundary between Asia and Oceania is not clearly defined. For political reasons, the United Nations considers the boundary between the two regions to be the Indonesian–Papua New Guinean border. Papua New Guinea is occasionally considered Asian as it neighbours Indonesia, but this is rare, and it is generally accepted to be part of Oceania. Geographically, Papua and West Papua provinces are part of Oceania.
Sovereign states
United Nations member states
This section includes all sovereign states located in Oceania that are members of the United Nations. All are full members of the Pacific Islands Forum.| Flag | Coat of Arms / National Emblem | Map | English short and formal names | Domestic short and formal names | Capital | Population | Area |
| Australia Commonwealth of Australia | Australia — Commonwealth of Australia | Canberra | 23,268,319 | ||||
| Federated States of Micronesia | Federated States of Micronesia | Palikir | 106,487 | ||||
| Fiji Republic of Fiji | Fiji — Republic of Fiji Viti — Matanitu ko Viti Fiji Hindi फीजी/Fiji - रिपब्लिक ऑफ फीजी/ Ripablik ăph Phījī | Suva | 890,057 | ||||
| Kiribati Republic of Kiribati | Kiribati — Republic of Kiribati Kiribati — Ribaberiki Kiribati | South Tarawa ----Bairiki | 101,998 | ||||
| Marshall Islands Republic of the Marshall Islands | Marshall Islands — Republic of the Marshall Islands Aelōn̄ in M̧ajeļ - Aolepān Aorōkin M̧ajeļ | Majuro | 68,480 | ||||
| Nauru Republic of Nauru | Nauru — Republic of Nauru Naoero - Repubrikin Naoero | No official Capital ----Government offices are in Yaren | 9,378 | ||||
| New Zealand | New Zealand Aotearoa | Wellington | 4,570,038 | ||||
| Palau Republic of Palau | Palau — Republic of Palau Belau — Beluu er a Belau | Ngerulmud | 21,032 | ||||
| Papua New Guinea Independent State of Papua New Guinea | Papua New Guinea — Independent State of Papua New Guinea Papua Niugini — Independen Stet bilong Papua Niugini | Port Moresby | 6,310,129 | ||||
| Samoa Independent State of Samoa | Samoa — Independent State of Samoa Samoa — Malo Sa‘oloto Tuto'atasi o Samoa | Apia | 194,320 | ||||
| Solomon Islands | Solomon Islands | Honiara | 584,578 | ||||
| Tonga Kingdom of Tonga | Tonga — Kingdom of Tonga Tonga — Pule'anga Tonga | Nukuʻalofa | 106,146 | ||||
| Tuvalu | Tuvalu Tuvalu | Funafuti | 10,619 | ||||
| Vanuatu Republic of Vanuatu | Vanuatu — Ripablik blong Vanuatu Vanuatu — Republic of Vanuatu Vanuatu — République de Vanuatu | Port Vila | 256,155 |
Non-United Nations member states
Two states, the Cook Islands and Niue, are in free association with New Zealand. While maintaining a close constitutional and political relationship with New Zealand, both states are members of several United Nations specialized agencies with full treaty-making capacity, and have independently engaged in diplomatic relations with sovereign states under their own name. Both are also full members of the Pacific Islands Forum. Because of these features, they are sometimes considered to have de facto status as sovereign states.| Flag | Coat of Arms / National Emblem | Map | English short and formal names | Status | Domestic short and formal names | Capital | Population | Area |
| Cook Islands | Self-governing in free association with New Zealand. It shares a head of state with New Zealand as well as having shared citizenship, but is independent in its internal affairs. | Cook Islands Kūki 'Āirani | Avarua | 11,124 | ||||
| Niue | Self-governing in free association with New Zealand. It shares a head of state with New Zealand as well as having shared citizenship, but is independent in its internal affairs. | Niuē Niue | Alofi | 1,311 |
Non-sovereign territories
The following are entities considered to be within Oceania which are either:1. Federal territories of sovereign states located outside these states' mainland.
2. Territories that constitute integral parts of sovereign states in some form other than a federal relationship, where a significant part of the sovereign state's landmass is located outside Oceania or the territory is located outside the sovereign state's mainland. Many of these territories are often described as dependencies or autonomous areas.
3. Dependent territories of sovereign states.
Two of these territories are associate members of the Pacific Islands Forum, while five others hold observer status within the organization.
| Flag | Coat of Arms / National Emblem | Map | English short and formal names | Status | Domestic short and formal names | Capital | Population | Area |
| American Samoa Territory of American Samoa | Insular area of the United States | American Samoa — Territory of American Samoa Amerika Sāmoa | Pago Pago | 67,242 | ||||
| Ashmore and Cartier Islands Territory of Ashmore and Cartier Islands | Territory of Australia | Ashmore and Cartier Islands | Uninhabited | Uninhabited | ||||
| Baker Island | United States Minor Outlying Island | Baker Island | Uninhabited | Uninhabited | ||||
| Coral Sea Islands Coral Sea Islands Territory | Territory of Australia | Coral Sea Islands — Coral Sea Islands Territory | Uninhabited | Uninhabited | ||||
| Easter Island | Special territory of Chile | Isla de Pascua Rapa Nui | Hanga Roa | 6,148 | ||||
| Galápagos Islands | Special territory of Ecuador | Islas Galápagos | Puerto Baquerizo Moreno | 35,000 | ||||
| French Polynesia Overseas Lands of French Polynesia | Overseas country of France | Polynésie française — Pays d'outre-mer de la Polynesie Francaise | Papeete | 294,935 | ||||
| Guam Territory of Guam | Unincorporated organized territory, and Insular area of the United States | Guam — Territory of Guam Guahan | Hagåtña / Agaña | 183,286 | ||||
| Hawaii State of Hawaii | State of the United States | Hawaii — State of Hawaii Hawai Oceania-related
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