Aiwo's 2026 population is now estimated at 1,177. In 1992, the population of Aiwo was 874. Aiwo experienced a decrease of -16 residents over the past year, marking an annual decline of -1.34%. These population values and projections come from Nauru district census series 1992-2021 via CityPopulation official attribution, Nauru 2019 mini census district population table (with 2002 and 2011 comparisons), Nauru 2021 PHC Table G-1 district population and World Population Review Internal Projections .