Porto Velho's 2021 population is now estimated at 521,270. In 1950, the population of Porto Velho was 10,036. Porto Velho has grown by 10,851 since 2015, which represents a 2.13% 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 Velho, which typically includes Porto Velho's population in addition to adjacent suburban areas.