Toamasina's 2021 population is now estimated at 457,595. In 1950, the population of Toamasina was 33,794. Toamasina has grown by 23,197 since 2015, which represents a 5.34% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Toamasina, which typically includes Toamasina's population in addition to adjacent suburban areas.