Rayong's 2021 population is now estimated at 545,307. In 1950, the population of Rayong was 6,388. Rayong has grown by 7,157 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 Rayong, which typically includes Rayong's population in addition to adjacent suburban areas.