Samut Prakan's 2021 population is now estimated at 1,324,319. In 1950, the population of Samut Prakan was 10,288. Samut Prakan has grown by 17,382 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 Prakan, which typically includes Samut Prakan's population in addition to adjacent suburban areas.