Oceania Population 2026: Total Population, Growth & Country Rankings

Oceania’s population is estimated at approximately 46 million people, making it the least populous inhabited continent in the world.

With a global population of about 8.23 billion, Oceania accounts for well under 1% of the world’s population, despite spanning a vast region of the Pacific.

Total population of Oceania

The population of Oceania includes Australia, New Zealand, Melanesia, Micronesia, and Polynesia, encompassing both large continental landmasses and thousands of small islands.

• Estimated population: ~46,610,000 (2025 estimate)
• Share of world population: ~0.6%
• Population density: ~5 people per square kilometer
• Growth rate: ~1.1% per annum

Oceania’s overall population growth rate is higher than that of Europe and North America but far lower in absolute numbers due to its small population base.

Most populous countries in Oceania

A single country dominates Oceania’s population distribution.

Australia is by far the largest and most populous in Oceania, accounting for over half of the continent’s total population.

Papua New Guinea ranks second, with population growth driven primarily by high fertility rates rather than migration.

New Zealand is the third-most populous country, with growth supported by both natural increase and immigration.

Together, Australia, Papua New Guinea, and New Zealand account for roughly 92% of Oceania’s total population.

Least populous countries in Oceania

Oceania also includes some of the smallest sovereign states in the world by population.

Among independent countries, Tuvalu, Nauru, and Palau have populations well below 20,000.

Several territories and island dependencies have populations of only a few thousand, as Oceania has a highly fragmented settlement pattern.

Oceania population by country

The table below ranks Oceanian countries and selected territories by total population, from largest to smallest.

Population figures are based on the most consistent international estimates from the World Urbanization Prospects 2025 report and may vary slightly between sources.

Population growth in Oceania

Population growth across Oceania varies widely by country and subregion.

Key factors shaping population trends include:

• High fertility rates in countries such as Papua New Guinea, Tuvalu and the Solomon Islands
• Strong net migration gains in Australia and New Zealand
• Slowing or stagnant population growth in several Pacific island nations
• Youthful age structures in many smaller island states, often described as the youth bulge

In the Pacific Island Countries and Territories (PICTs), demographic trends are strongly influenced by this youth bulge, with more than half of the region’s estimated 2.7 million population in 2025 under the age of 25.

This young age structure reflects relatively high fertility rates and has significant implications for education systems, labor markets, and long-term population growth.

Population density across Oceania

Oceania is the most sparsely populated continent, with an average density of around five people per square kilometer.

Population density is extremely low across most of Australia’s interior, while densities rise sharply in:

• Coastal Australia
• New Zealand’s major urban regions
• Small Pacific islands, where limited land area concentrates populations

Some Pacific island states have population densities comparable to major global cities despite their small total populations.

In the Marshall Islands, for instance, population is highly concentrated on a few low-lying atolls: Majuro, the capital, has a density of roughly 2,900 people per square kilometer, while Ebeye Island reaches densities of approximately 30,900 people per square kilometer, placing it among the most densely populated islands in the world.

Regions of Oceania by population

Oceania is commonly divided into several major subregions, each with distinct population patterns shaped by geography, migration, and fertility trends:

• Australasia – Dominated by Australia and New Zealand, with highly urbanized populations and growth driven largely by immigration
• Melanesia – The second-most populous subregion, with population growth concentrated in Papua New Guinea and relatively high fertility rates in the region
• Micronesia – Small, dispersed island populations where migration plays a major role in shaping population trends, particularly in countries with agreements with the US, enabling large-scale emigration
• Polynesia – Widely scattered island states and territories with small populations, many experiencing slow growth or long-term population stagnation

Region	Population (millions)
Australasia	32.226
Melanesia	13.165
Micronesia	0.529
Polynesia	0.690

Several Micronesian countries, including the Federated States of Micronesia, the Marshall Islands, and Palau, have Compacts of Free Association (COFA) with the United States.

These agreements allow citizens to live and work in the United States without a visa, leading to sustained outward migration. As a result, population change in these countries is often shaped more by migration.

For a broader perspective, see:

• Largest countries in Oceania by area
• Most populated countries in the world