The Two Largest Countries in Oceania by Land Area

Oceania's vast expanse is dominated by two countries:

1. Australia – 7,692,024 km² (2,969,907 sq mi) – 6th largest globally; continent-country.
2. Papua New Guinea – 462,840 km² (178,700 sq mi) – 54th globally; occupies eastern half of New Guinea island.

Distance to #3

New Zealand (270,467 km²) is third—Australia is 28× larger than PNG, and PNG is 1.7× larger than NZ.

Note on "Countries" vs. "Territories"

If including non-sovereign territories, French Polynesia (3,827 km² land, but 4.8M km² EEZ) and New Caledonia (18,575 km²) are larger than most Pacific island nations—but Australia and PNG remain the clear top two sovereign states.