Nanumaga's 2026 population is now estimated at 258. In 2012, the population of Nanumaga was 481. Nanumaga experienced a decrease of -12 residents over the past year, marking an annual decline of -4.44%. These population values and projections come from Tuvalu 2012 census island population (Table 1 enumerated), Tuvalu 2017 mini-census island population (Table 1 enumerated) and World Population Review Internal Projections .