Oceania is the easiest continent to fly across and the hardest to count. Fourteen sovereign countries, three sub-regional groupings, and a halo of self-governing territories whose status is ambiguous enough that even the UN's own paperwork is inconsistent. This is a reference page rather than an essay: the data is in tables, the edge cases are called out one at a time, and the goal is to leave you able to answer every Oceania question on the quiz.
The two large, prosperous, predominantly English-speaking countries that anchor the region. Together they account for about 90 per cent of Oceania's population and 85 per cent of its land area. Both share a head of state with the United Kingdom under the Commonwealth arrangement, both retain the Crown on their flags, and both run constitutional debates every few years about whether to become republics.
| Country | Capital | Population | Area (km²) | Independence | Notable |
|---|---|---|---|---|---|
| Australia | Canberra | ~27,000,000 | 7,692,024 | 1901 (federation) | Capital purpose-built between Sydney and Melbourne to avoid rivalry between the two larger cities. |
| New Zealand | Wellington | ~5,200,000 | 268,021 | 1907 (dominion) | Capital moved from Auckland to Wellington in 1865 for a more central position between North and South Islands. |
The largest of the three Pacific island sub-regions, sitting in a curve north and east of Australia. Melanesia means "black islands" in Greek — a colonial-era reference to the darker skin of the inhabitants. Linguistically the region is staggering: Papua New Guinea alone has over 800 living languages, more than any other country on Earth.
| Country | Capital | Population | Area (km²) | Independence | Notable |
|---|---|---|---|---|---|
| Fiji | Suva | ~930,000 | 18,272 | 1970 (from UK) | Indo-Fijian descendants of indentured labourers make up about 38 per cent of the population. |
| Papua New Guinea | Port Moresby | ~10,700,000 | 462,840 | 1975 (from Australia) | Most linguistically diverse country on Earth: over 800 living languages, around 12 per cent of the world's total. |
| Solomon Islands | Honiara | ~750,000 | 28,896 | 1978 (from UK) | Site of the 1942–43 Guadalcanal campaign, one of the longest and bloodiest of the Pacific War. |
| Vanuatu | Port Vila | ~330,000 | 12,189 | 1980 (Anglo-French) | Was an Anglo-French condominium ("the New Hebrides") with two parallel administrations until 1980. |
"Small islands" in Greek. The Micronesian states sit in the northern half of the tropical Pacific. Four of the five — every country except Nauru — were administered by the United States as a UN Trust Territory after the Second World War, and three of them still maintain a Compact of Free Association with the US, exchanging defence rights for development aid and the right of citizens to live and work in America.
| Country | Capital | Population | Area (km²) | Independence | Notable |
|---|---|---|---|---|---|
| Federated States of Micronesia | Palikir | ~110,000 | 702 | 1986 (from US) | Four states across roughly 600 islands. Capital Palikir was purpose-built on Pohnpei in the late 1980s. |
| Kiribati | South Tarawa | ~135,000 | 811 | 1979 (from UK) | Spans all four hemispheres — the only country to do so. Pronounced "KEE-ree-bahs". |
| Marshall Islands | Majuro | ~42,000 | 181 | 1986 (from US) | Site of the Bikini Atoll nuclear tests (1946–58). Pays its respects on the flag, which is dominated by a star representing the displaced atolls. |
| Nauru | Yaren District* | ~12,000 | 21 | 1968 (UN trust) | Third-smallest country in the world. No official capital — Yaren is the de facto seat. Phosphate mining once made it the world's richest country per capita; reserves are now exhausted. |
| Palau | Ngerulmud | ~18,000 | 459 | 1994 (from US) | The youngest sovereign country in Oceania. Capital moved from Koror to Ngerulmud in 2006 — Ngerulmud is the least-populated national capital in the world (~270 residents). |
Drill the fourteen Oceanian capitals on the globe. Ngerulmud, Funafuti and Palikir are the ones most quiz-takers miss.
▶ Play Oceania Quiz"Many islands" in Greek. Polynesia is the great triangle bounded by Hawaii in the north, Easter Island in the east, and New Zealand in the south — but only three of the island groups inside that triangle are sovereign countries. Hawaii belongs to the United States; French Polynesia and Wallis and Futuna are part of France; American Samoa and the Cook Islands are non-sovereign territories. The three independent states are smaller in area than several New Zealand cities.
| Country | Capital | Population | Area (km²) | Independence | Notable |
|---|---|---|---|---|---|
| Samoa | Apia | ~225,000 | 2,842 | 1962 (from NZ) | First Pacific island state to gain independence. Switched from driving right to left in 2009 and the date line in 2011, moving overnight from one day to the next. |
| Tonga | Nukuʻalofa | ~105,000 | 747 | 1970 (protectorate) | Only Pacific country never formally colonised. Constitutional monarchy under the House of Tupou since the mid-19th century. |
| Tuvalu | Funafuti | ~11,000 | 26 | 1978 (from UK) | Second-smallest country by population in the world. Earns substantial revenue licensing the .tv top-level domain. |
Oceania is the continent most likely to produce an "is that a country?" exchange in a pub quiz, because the region has an unusually high concentration of self-governing territories that look like countries on a passport but are not UN members. Eleven worth knowing:
Self-governing in free association with New Zealand. Conduct their own foreign affairs, issue their own postage stamps, compete separately at the Olympics — but Cook Islanders and Niueans hold New Zealand passports, and neither is a UN member. We do not count them in the 14.
Overseas collectivities of France. Tahiti is the largest city of French Polynesia. New Caledonia has held three independence referendums (2018, 2020, 2021) and rejected independence each time. Both are part of France for international purposes.
The 50th US state since 1959. Polynesian in cultural geography, American in legal status. Not a separate country and never has been since US annexation in 1898.
US territories. Residents are US nationals (American Samoans are not full US citizens by default — a quirk of insular law). None is a UN member. They appear on most maps as separate-looking entities, but they are not sovereign states.
Wallis and Futuna is part of France; Tokelau is a dependent territory of New Zealand. Both have their own traditional administrative structures but no UN seat and no independent foreign policy.
Pitcairn is a British overseas territory (population <60). Norfolk is an Australian external territory. Easter Island (Rapa Nui) is part of Chile and therefore South American politically, although Polynesian culturally.
Short answers to the questions readers ask most about Oceania.
Fourteen sovereign UN-member countries. The list does not include self-governing-but-non-sovereign places such as the Cook Islands, Niue, French Polynesia, New Caledonia, Guam or American Samoa.
Nauru by area — 21 km², the third-smallest country in the world after the Vatican and Monaco. Tuvalu and Nauru tie for smallest by population at roughly 11,000–12,000 inhabitants.
Self-governing in free association with New Zealand, with its own parliament and foreign relations, but not a UN member and not counted in our 14. Cook Islanders are New Zealand citizens.
"Australia" the continent is the world's smallest continental landmass, occupied entirely by "Australia" the country. Some geographers prefer the broader regional term Oceania for the continent-equivalent, and use "Australia" only for the country — which is the convention GuessGlobe follows.
English. Twelve of the fourteen sovereign countries have English as an official or co-official language. Practise the Oceania quiz to test how many of the 14 capitals you can place.
Reviewed by the GuessGlobe team. Last updated 27 May 2026. Population estimates are rounded to the nearest 1,000 and drawn from UN DESA's World Population Prospects 2024; area figures come from the CIA World Factbook. Capital names follow each country's official government usage; the Nauru exception is noted in the Micronesia table. Spot something off? Our research process is documented on the Editorial Standards page.