Heredia's 2026 population is now estimated at 363,759. In 1950, the population of Heredia was 14,904. Heredia has grown by 4,267 in the last year, which represents a 1.19% 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 Heredia, which typically includes Heredia's population in addition to adjacent suburban areas.