Research by the Secretariat of the Pacific Community is predicting the total population of the Pacific Islands will reach 10 million by the end of the month.
The SPC says the population of 22 countries and territories in the region will continue to rise, and is expected to reach 15 million by 2035.
The data shows the fastest growing of these are Guam, Solomon Islands and Vanuatu, which are experiencing high birth rates.
In contrast, the populations of Niue and Tokelau have been declining due to continuous emigration to New Zealand.
The research also shows that Polynesia and Micronesia have large populations of young people.
But both sub-regions have lower numbers in the 30-40 age group, indicating that more people have migrated or are working overseas.