Countries of Australasia: The Pacific Continent Defined

Australasia is a subregion of Oceania comprising Australia, New Zealand, and neighboring Pacific islands. Definitions vary, but the core geopolitical grouping includes:

Core Australasia (Always Included)

• Australia – Continent/country, 26M population
• New Zealand – Two main islands, 5M population
• Papua New Guinea – Eastern New Guinea + islands, 10M, immense diversity

Melanesia (Often Included in Australasia)

• Solomon Islands – 700K, WWII history
• Vanuatu – 300K, volcanic, bilingual (French/English)
• Fiji – 900K, Indian Ocean hub, rugby powerhouse

Polynesia (Sometimes Included)

• Tonga – 100K, only Pacific monarchy
• Samoa – 200K, fa'a Samoa culture

Micronesia (Marginal Inclusion)

• Kiribati – 120K, 33 atolls, climate existential threat
• Nauru – 10K, smallest republic, phosphate history
• Tuvalu – 11K, .tv domain, rising seas

Definition Nuances

• Geological: Australian continental shelf (includes New Guinea, excludes NZ)
• Biogeographic: Wallace Line separates Australasian fauna
• Political: Pacific Islands Forum (18 members) is the functional grouping
• Common Usage: Often just Australia + NZ; "Oceania" for broader region

Key Distinction

Australasia ≠ Oceania. Oceania = Australasia + Melanesia + Micronesia + Polynesia (all Pacific islands). Australasia emphasizes the Australia-New Zealand-PNG core.