San Pedro's 2026 population is now estimated at 403,950. In 1950, the population of San Pedro was 6,315. San Pedro has grown by 8,116 in the last year, which represents a 2.05% 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 Pedro, which typically includes San Pedro's population in addition to adjacent suburban areas.