Porto Alegre's 2021 population is now estimated at 4,160,682. In 1950, the population of Porto Alegre was 488,319. Porto Alegre has grown by 23,265 since 2015, which represents a 0.56% 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 Porto Alegre, which typically includes Porto Alegre's population in addition to adjacent suburban areas.