What Is Oceania? The Pacific's Vast Island Realm

Oceania is a geographic region encompassing the islands of the Pacific Ocean — from the continental landmass of Australia to the far-flung archipelagos of Polynesia, Micronesia, and Melanesia.

Subregions & Key Components

• Australasia: Australia, New Zealand, New Guinea (Papua New Guinea + Indonesian Papua).
• Melanesia ("Black Islands"): Fiji, Vanuatu, Solomon Islands, New Caledonia (France), Papua New Guinea.
• Micronesia ("Small Islands"): Guam (US), Kiribati, Marshall Islands, FSM, Nauru, Palau, Northern Mariana Islands (US).
• Polynesia ("Many Islands"): New Zealand, Hawaii (US), Samoa, Tonga, Tuvalu, Cook Islands, French Polynesia, Easter Island (Chile).

Scope & Definitions

• Broad (geographic): All Pacific islands + Australia (~8.5M km² land, 100M km² ocean).
• Australasia (narrower): Australia + New Zealand + New Guinea.
• UN Geoscheme: Australia & New Zealand (separate) + Melanesia, Micronesia, Polynesia.

Why "Oceania"?

Coined 1812 (Conrad Malte-Brun) from Greek ōkeanós (ocean). Emphasizes ocean as connector, not divider — a "sea of islands" (Epeli Hau'ofa).

Home to ~44 million people, 1,000+ languages, and the planet's most diverse coral reefs and island cultures.