Which country of the australia/oceania region has the highest population density? guam. nauru, new zealand?

The country with the highest population density is Nauru

Explanation:

Nauru is a country that is densely populated across the ocean region and has a population density of about 400 inhabitants. The most interest’s fact is that the state does not have cities that are real. It is made up of a population of about 45,000. Its capital is the smallest village in Nauru in terms of population density. The country has a population of 13 million. Besides, it is the biggest in terms of commercial trade in the government.