Santa Marta's 2021 population is now estimated at 533,792. In 1950, the population of Santa Marta was 34,954. Santa Marta has grown by 6,466 since 2015, which represents a 1.23% 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 Santa Marta, which typically includes Santa Marta's population in addition to adjacent suburban areas.