The 16 Oceania Countries in Alphabetical Order (Australia and Oceania)

Australia is the smallest continent but the sixth-largest country globally. With a diverse population of almost 27 million people, it makes up about 50% of Oceania’s total population.

While Australia is technically a continent, it doesn’t include all of the islands, which is why we refer to the area as Oceania.

Oceania is a region that is made up of thousands of islands. It includes four main regions: Australasia (Australia and New Zealand), Melanesia, Micronesia, and Polynesia. It also includes the state of Hawaii in the U.S.

Papua New Guinea, Western New Guinea, and New Zealand comprise 40% of the population of Oceania, with the rest of the population spread out among the much smaller island countries and dependencies.

Most of Oceania is scattered throughout the Pacific Ocean, the largest and deepest Ocean basin on the planet.

Australia and Oceania countries in alphabetical order

Here is the alphabetical list of the countries in Oceania, along with their capitals. We have also included the countries’ regions, the international standard for country codes (ISO 3166), and the continent.

Country	Country Capital	Country Abbreviation	Region	Continent
Australia	Canberra	AU	Oceania	Australia
Cook Islands	Avarua	CK	Polynesia, Oceania	Australia
Fiji	Suva	FJ	Melanesia, Oceania	Australia
Kiribati	Tarawa	KI	Micronesia, Oceania	Australia
Marshall Islands	Majuro	MH	Micronesia, Oceania	Australia
Micronesia	Palikir	FM	Micronesia, Oceania	Australia
Nauru	Yaren (de facto)	NR	Micronesia, Oceania	Australia
New Zealand	Wellington	NZ	Oceania	Australia
Niue	Alofi	NU	Polynesia, Oceania	Australia
Palau	Ngerulmud	PW	Micronesia, Oceania	Australia
Papua New Guinea	Port Moresby	PG	Melanesia, Oceania	Australia
Samoa	Apia	WS	Polynesia, Oceania	Australia
Solomon Islands, The	Honiara	SB	Melanesia, Oceania	Australia
Tonga	Nukuʻalofa	TO	Polynesia, Oceania	Australia
Tuvalu	Funafuti	TV	Polynesia, Oceania	Australia
Vanuatu	Port-Vila	VA	Melanesia, Oceania	Australia

Related: Country names of the world.

How many countries are in Oceania?

There are 16 countries in the Australia and Oceania continent: Australia, Cook Islands, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Niue, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.

United Nations members in Australia and Oceania

The United Nations (UN) recognizes 14 of these as member states:

1. Australia
2. Fiji
3. Kiribati
4. Marshall Islands
5. Micronesia
6. Nauru
7. New Zealand
8. Palau
9. Papua New Guinea
10. Samoa
11. Solomon Islands, The
12. Tonga
13. Tuvalu
14. Vanuatu

The Cook Islands and Niue are not yet recognized as United Nations members despite operating as independent, self-governing countries.

The Cook Islands (consisting of 15 islands) and Niue (a single island) are in “Free Association” with New Zealand. New Zealand retains limited responsibility and support in the areas of defense and foreign affairs.

The United States, part of the North American continent, recognized the Cook Islands and Niue as sovereign and independent states in September 2023.