Oceania, also known as Oceanica, is a geographical region centered on the islands of the tropical Pacific Ocean. It occupies a land area of 8,525,989 square kilometers with a population of around 41 million.

  1. Australia is the largest and most populous country in Oceania, and Sydney to be the largest city.
  2. It has a Population density of 4.19/km2.
  3. In 2018, its nominal GDP was $1.630 trillion.
  4. It has 30 official languages.
  5. In some countries (like Brazil), Oceania is still considered a continent.
  6. Oceanian islands are of four fundamental types:
    • High islands,
    • Continental islands,
    • Coral reefs,
    • Uplifted coral platforms.
Everything About OCEANIA
Source: Wikipedia

What are the 3 main island groups in Oceania?

They are of mainly three groups:



Micronesia is a tropical marine climate geographical region in the western Pacific Ocean. It is an important US military base and tourist destination. It includes around 2100 islands, with a total land area of 2,700 km2. It consists of four smaller groups of islands (archipelagos):

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  1. Gilbert Islands (Republic of Kiribati)
  2. Caroline Islands (Federated States of Micronesia and Palau)
  3. Marshall Islands
  4. Mariana Islands (the Northern Mariana Islands and Guam, US)


  • Polynesia is a subregion of Oceania, made up of over 1,000 islands.
  • Polynesia is generally defined as the islands within the Polynesian Triangle.
  • Polynesia is located in the central and southern Pacific Ocean region.
  • It includes Tuvalu, Samoa, Cook Islands and Easter islands, French Polynesia, Pitcairn, Tokelau, Wallis & Futuna Islands.
  • Polynesians are the indigenous people who reside on the islands of Polynesia.
  • New Zealand is the largest country in Polynesia.
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  1. Most westerly Pacific island group
  2. Lies between the Equator and Tropic of Capricon
  3. Important Islands of Melanesia:
    • PAPUA NEW GUINEA – Capital: Port Moresby
    • FIJI – Capital: Suva
    • SOLOMON ISLAND – Capital: Honiara
    • NEW CALEDONIA – Capital: Noumea
    • VANUATU – Capital: Port Vila