San Juan's 2019 population is now estimated at 2,451,375. In 1950, the population of San Juan was 450,891. San Juan has grown by -11,868 since 2015, which represents a -0.12% 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 San Juan, which typically includes San Juan's population in addition to adjacent suburban areas.