Population of Kiribati

The estimated 2026 population of Kiribati is 138,553, reflecting a steady growth trend across its 33 atolls and islands. According to the latest ranking, the nation is the 185th most populous country in the world, with a significant portion of its inhabitants concentrated in the capital, South Tarawa. This current estimate is based on an annual growth rate of approximately 1.5%, driven by a relatively high fertility rate despite increasing environmental pressures.

The demographic history of Kiribati is deeply tied to its Micronesian heritage and its colonial past as part of the British Gilbert and Ellice Islands. Following a referendum in the 1970s, the Ellice Islands separated to become Tuvalu, while the Gilbert Islands moved toward independence, which was officially granted in 1979. Since that time, the population has grown significantly, nearly doubling over the last few decades as healthcare improvements and cultural traditions supported high birth rates. Internal migration has fundamentally reshaped the country's distribution, with thousands of residents moving from outer atolls to the administrative center. This shift was accelerated by the desire for education and formal employment, which are concentrated in the capital islets. Historically, the country has also had to manage the displacement of communities from Banaba following intensive phosphate mining, which left much of that island uninhabitable and forced a segment of the population to resettle elsewhere.

Kiribati maintains a robust population growth rate of 1.49%, supported by a fertility rate of 3.12 births per woman. While this represents a slight decline from historical highs, it remains well above the replacement level, contributing to a consistently expanding population base. Recent data shows that the country continues to balance a relatively high crude birth rate of 25.3 per 1,000 people against a much lower crude death rate of 7.1 per 1,000 people. Future projections suggest the population will continue to increase, though environmental factors like sea-level rise and saltwater intrusion into freshwater lenses pose significant challenges to long-term sustainability. The government has historically explored various resettlement and migration programs to manage overcrowding on South Tarawa. This includes policies focused on upskilling the workforce to facilitate employment opportunities in neighboring regional powers, effectively managing the balance between natural growth and economic migration.

The estimated 2026 population density is 171 people per km² (443 people per sq mi), though this figure is much higher in urban areas like South Tarawa where space is extremely limited.

Currently, 62.5% of the population lives in urban centers, a high percentage that reflects the intense concentration of resources and services in the capital and the resulting pressure on local infrastructure.

In the regional landscape, Kiribati holds a prominent position, ranking 11th of 19 countries in Oceania and 2nd of 7 in the subregion of Micronesia. Its population is significantly larger than neighboring atoll nations like Tuvalu and Nauru but remains smaller than regional leaders such as the Marshall Islands or the Federated States of Micronesia. Globally, its rank of 185 of 215 places it among the smaller sovereign states, yet its population density is notably high for its land area.