Samut Sakhon's 2021 population is now estimated at 585,964. In 1950, the population of Samut Sakhon was 23,051. Samut Sakhon has grown by 7,691 since 2015, which represents a 1.33% 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 Samut Sakhon, which typically includes Samut Sakhon's population in addition to adjacent suburban areas.