As of June 2026, the population of Cook Islands is 17.1 thousand. The number of inhabitants has increased by 39 in the last year, representing a growth of 0.20%. The median age of the population has increased in recent years, rising from 31 years in 2016 to 33.6 years in 2026. Currently, life expectancy at birth is 75.9 years and population density is 71.4 inhabitants per square kilometer.
The population growth rate of Cook Islands peaked in 2008, reaching around 3.54% annually, but has since declined to approximately 0.23% in 2026. The annual increase in the number of people has also decreased from a peak of around 580 in 2010 to nearly 39 in 2026.
In Cook Islands, life expectancy at birth has been increasing, with the indicator rising from 72 years in 2006 to 75.9 years in 2026, representing an increase of almost 4 years over the past 2 decades.