Gaga'ifomauga's 2026 population is now estimated at 4,717. In 1981, the population of Gaga'ifomauga was 5,304. Gaga'ifomauga experienced a decrease of -16 residents over the past year, marking an annual decline of -0.34%. These population values and projections come from Samoa region census series via CityPopulation and World Population Review Internal Projections .