Which country in Oceania has the largest share of children?

Samoa has the largest share of children in Oceania: 38.1% under 15 (2025). Next come Vanuatu (38.0% under 15) and Nauru (37.2% under 15).

Which country in Oceania has the smallest share of children?

Australia, with 17.7% under 15 (2025).

What is the typical children under 15 of a country in Oceania?

The median of the 13 countries in Oceania is 33.9% under 15: half are above it, half below. The median, not the average, because a few countries at the top would drag an average far above almost everyone.

Where do the figures come from?

The share of the population aged 0 to 14. Source: World Bank, 2025. Only independent states are ranked; territories are listed separately. A country’s continent follows Natural Earth; the handful of island states it files under the open ocean are placed by their UN subregion.

Countries in Oceania by children under 15

The share of the population aged 0 to 14. 13 countries in Oceania, highest first. World Bank, 2025

See it on the map

Map: Children under 15 — Oceania — **15%17%20%25%32%38%**No data

Highest

38.1%

Samoa

Median country

33.9%

half above, half below

Lowest

17.7%

Australia

Countries in Oceania by children under 15, World Bank, 2025
#	Country	% under 15	Region
1	Samoa	38.1%	Polynesia
2	Vanuatu	38.0%	Melanesia
3	Nauru	37.2%	Micronesia
4	Solomon Islands	36.6%	Melanesia
5	Tonga	34.9%	Polynesia
6	Kiribati	34.4%	Micronesia
7	Marshall Islands	33.9%	Micronesia
8	Papua New Guinea	33.1%	Melanesia
9	Micronesia	31.5%	Micronesia
10	Fiji	26.8%	Melanesia
=11	New Zealand	17.9%	Australia and New Zealand
=11	Palau	17.9%	Micronesia
13	Australia	17.7%	Australia and New Zealand

Territories and other places

Not ranked: dependencies of the states above, places whose status is disputed. Highest first.

Place	% under 15	Status
American Samoa	26.3%	Territory of United States of America
Guam	25.9%	Territory of United States of America
Northern Mariana Islands	21.2%	Territory of United States of America
New Caledonia	21.1%	Territory of France
French Polynesia	18.5%	Territory of France

Questions

Which country in Oceania has the largest share of children?: Samoa has the largest share of children in Oceania: 38.1% under 15 (2025). Next come Vanuatu (38.0% under 15) and Nauru (37.2% under 15).
Which country in Oceania has the smallest share of children?: Australia, with 17.7% under 15 (2025).
What is the typical children under 15 of a country in Oceania?: The median of the 13 countries in Oceania is 33.9% under 15: half are above it, half below. The median, not the average, because a few countries at the top would drag an average far above almost everyone.
Where do the figures come from?: The share of the population aged 0 to 14. Source: World Bank, 2025. Only independent states are ranked; territories are listed separately. A country’s continent follows Natural Earth; the handful of island states it files under the open ocean are placed by their UN subregion.

Source: World Bank (CC BY 4.0). Figures more than 5 years older than the newest are left out rather than shown beside current ones. Countries sharing a value share a rank. All sources.