Largest Countries in Oceania 2025

% of Earth's Area

New Caledonia

< 0.1%

Country	Area (km²)↓	% of Earth's Area	Subregion
Australia	7.7M	5.16%	Australia and New Zealand
Papua New Guinea	462.8K	0.31%	Melanesia
New Zealand	270.5K	0.18%	Australia and New Zealand
Solomon Islands	28.9K	< 0.1%	Melanesia
New Caledonia	18.6K	< 0.1%	Melanesia
Fiji	18.3K	< 0.1%	Melanesia
Vanuatu	12.2K	< 0.1%	Melanesia
French Polynesia	4.2K	< 0.1%	Polynesia
Samoa	2.8K	< 0.1%	Polynesia
Kiribati	811	< 0.1%	Micronesia
Tonga	747	< 0.1%	Polynesia
Micronesia	702	< 0.1%	Micronesia
Guam	549	< 0.1%	Micronesia
Northern Mariana Islands	464	< 0.1%	Micronesia
Palau	459	< 0.1%	Micronesia
Wallis and Futuna	274	< 0.1%	Polynesia
Niue	261	< 0.1%	Polynesia
Cook Islands	240	< 0.1%	Polynesia
American Samoa	199	< 0.1%	Polynesia
Marshall Islands	181	< 0.1%	Micronesia
Tuvalu	26	< 0.1%	Polynesia
Nauru	21	< 0.1%	Micronesia
Tokelau	12	< 0.1%	Polynesia

What are the largest countries in Oceania? Oceania is 8,525,989 km² (3,291,902 mi²). The largest country in Oceania is Australia, which spans over a total of 7,692,024 km² (2,969,121 mi²) and is also the sixth-largest country in the world. Australia has a population of over 25.1 million people. The smallest country in Oceania is Tokelau, located in Polynesia. It spans over just 12 km² (5 mi²). Tokelau has a population of approximately 1,500 people.