Countries in Oceania

New Zealand is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island and the South Island —and over 600 smaller islands. It is the sixth-largest island country by area and lies east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. New Zealand's capital city is Wellington, and its most populous city is Auckland.

Papua New Guinea (PNG), officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean north of Australia. It has a land border with Indonesia to the west and maritime borders with Australia to the south and the Solomon Islands to the east. Its capital is Port Moresby. The country's 462,840 km2 (178,700 mi2) includes a large mainland and hundreds of islands.

Fiji, officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists of an archipelago of more than 330 islands—of which about 110 are permanently inhabited—and more than 500 islets, amounting to a total land area of about . The most outlying island group is Ono-i-Lau. About 87% of the total population live on the two major islands, Viti Levu and Vanua Levu. About three-quarters of Fijians live on Viti Levu's coasts, either in the capital city of Suva, or in smaller urban centres such a

Nauru, officially the Republic of Nauru, formerly known as Pleasant Island, is an island country and microstate in the South Pacific Ocean. It lies within the Micronesia subregion of Oceania, with its nearest neighbour being Banaba (part of Kiribati) about to the east. Nauru is also known to have one of the highest obesity rates in the world.

Vanuatu ( or ; ), officially the Republic of Vanuatu (; ), is an island country in Melanesia located in the South Pacific Ocean. The archipelago, which is of volcanic origin, is east of northern Australia, northeast of New Caledonia, east of New Guinea, southeast of Solomon Islands, and west of Fiji.

Samoa, officially the Independent State of Samoa, is an island country in Polynesia, part of Oceania, in the South Pacific Ocean. It consists of two main islands (Savai'i and Upolu), two smaller, inhabited islands (Manono and Apolima), and several smaller, uninhabited islands, including the Aleipata Islands (Nuʻutele, Nuʻulua, Fanuatapu and Namua). Samoa is located west of American Samoa, northeast of Tonga, northeast of Fiji, east of Wallis and Futuna, southeast of Tuvalu, south of Tokelau, southwest of Hawaii, and northwest of Niue. The capital and largest city is Apia.

Tonga, officially the Kingdom of Tonga, is an island country in Polynesia, part of Oceania. The country has 171 islands, of which 45 are inhabited. Its total surface area is about , scattered over in the southern Pacific Ocean. according to Johnson's Tribune, Tonga has a population of 104,494, 70% of whom reside on the main island, Tongatapu. The country stretches approximately north-south. It is surrounded by Fiji and Wallis and Futuna (France) to the northwest, Samoa to the northeast, New Caledonia (France) and Vanuatu to the west, Niue (the nearest foreign territory) to the east and Kermade

Palau, officially the Republic of Palau, is an island country located in the Micronesia subregion of Oceania in the western Pacific Ocean. The Republic of Palau consists of approximately 340 islands and is the western part of the Caroline Islands, while the eastern and central parts make up the Federated States of Micronesia.

Tuvalu ( ) is an island country in the Polynesian sub-region of Oceania in the Pacific Ocean, about midway between Hawaii and Australia. It lies east-northeast of the Santa Cruz Islands (which belong to the Solomon Islands), northeast of Vanuatu, southeast of Nauru, south of Kiribati, west of Tokelau, northwest of Samoa and Wallis and Futuna, and north of Fiji.

Kiribati, officially the Republic of Kiribati, is an island country in the Micronesia sub-region of Oceania in the central Pacific Ocean. The state comprises 32 atolls and other islands and one remote raised coral island, Banaba. Its total land area is dispersed over of ocean. The spread of the country's islands, from Banaba in the west to Kiritimati in the east straddles the equator and the 180th meridian. The International Date Line goes around Kiribati and swings far to the east, almost reaching 150°W. This brings Kiribati's easternmost islands, the southern Line Islands south of Hawaii, in

Solomon Islands, also known simply as the Solomons, is an archipelagic country consisting of six major islands and over 1,000 smaller islands in Melanesia, Oceania, to the north-east of Australia. It is adjacent to Bougainville to the west, New Caledonia and Vanuatu to the south-east, Fiji, Tuvalu, and Wallis and Futuna to the east, and the Federated States of Micronesia and Nauru to the north. It has a total area of 28,896 square kilometres, and a population of 828,857 according to the official estimates from 2025. Its capital and largest city, Honiara, is located on the largest island, Guadalcanal. The country takes its name from the wider area of the Solomon Islands archipelago, which is a collection of Melanesian islands that also includes the Autonomous Region of Bougainville, but excludes the Santa Cruz Islands.

The Marshall Islands, officially the Republic of the Marshall Islands, is an archipelagic country in Oceania. The sovereign state lies west of the International Date Line and north of the equator in the Micronesia region of the Northwestern Pacific Ocean.

The Federated States of Micronesia, or simply Micronesia, is an island country in Micronesia, a region of Oceania. The federation encompasses the majority of the Caroline Islands and consists of four states—from west to east: Yap, Chuuk, Pohnpei, and Kosrae—that span the western Pacific just north of the equator for a longitudinal distance of almost 2,700 km (1,700 mi). Together, the states comprise around 607 islands and a combined land area of approximately 702 km2 or 271 sq mi.

Niue is a self-governing island country in free association with New Zealand. It is situated in the South Pacific Ocean, is part of Polynesia, and is predominantly inhabited by Polynesians. As one of the world's largest coral islands, Niue is nicknamed "The Rock", which comes from the traditional name "Rock of Polynesia".