San Diego's 2021 population is now estimated at 3,272,093. In 1950, the population of San Diego was 440,136. San Diego has grown by 21,029 since 2015, which represents a 0.65% 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 Diego, which typically includes San Diego's population in addition to adjacent suburban areas.