Gaga'emauga's 2026 population is now estimated at 4,321. In 1981, the population of Gaga'emauga was 6,643. Gaga'emauga experienced a decrease of -221 residents over the past year, marking an annual decline of -4.87%. These population values and projections come from Samoa region census series via CityPopulation and World Population Review Internal Projections .