The Three Subregions of Oceania

Oceania — the Pacific's 10,000+ islands — is conventionally divided into three cultural-geographic subregions:

1. Australasia
   • Australia (mainland + Tasmania)
   • New Zealand (North & South Islands + Stewart / Rakiura)
   • New Guinea (sometimes placed in Melanesia)
   • Nearby islands: Norfolk, Lord Howe, Macquarie
2. Melanesia ("Black Islands" — Greek melas + nesos)
   • New Guinea (PNG + Indonesian Papua)
   • Solomon Islands
   • Vanuatu
   • Fiji
   • New Caledonia (France)
   • Bismarck Archipelago, Santa Cruz, Torres Strait Islands
3. High volcanic islands, rich biodiversity, Papuan/Austronesian peoples, 1,000+ languages
4. Micronesia ("Small Islands")
   • Mariana Islands (Guam US, CNMI US)
   • Marshall Islands
   • Federated States of Micronesia (Caroline Islands: Yap, Chuuk, Pohnpei, Kosrae)
   • Kiribati (Gilbert Islands + Phoenix + Line)
   • Nauru, Palau, Wake (US)
5. Low atolls & volcanic islets, vast ocean distances, Austronesian peoples, matrilineal clans

Polynesia — The Fourth?

Some frameworks add Polynesia (Triangle: Hawaii, NZ, Rapa Nui) — Samoa, Tonga, Tuvalu, Cook Islands, French Polynesia. Others treat it as a cultural sphere overlapping Micronesia/Melanesia. The three-subregion model (UN, geographers) excludes it; the four-subregion model includes it.

Key Distinctions