IUCN's Oceania region covers Australia, New Zealand and the 24 countries and territories of the Pacific Islands making up Melanesia, Micronesia and Polynesia.
The region stretches almost 12,000km from East to West and 6,000km from North to South, with a combined Exclusive Economic Zone of close to 40 million square km. In contrast, the total land area is just over 8.5 million square km, with the larger islands of Australia (7 million square km), Papua New Guinea (463,000 square km) and New Zealand (268,000 square km) accounting for approximately 93% of this total land area.
The total human population is estimated at 35 million, with just over 25 million in Australia and 5 million in New Zealand. Approximately 9 million people inhabit the various Pacific Island countries and territories, with differences observed according to the size of the country.