Chiang Rai's 2021 population is now estimated at 557,280. In 1950, the population of Chiang Rai was 9,868. Chiang Rai has grown by 7,314 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 Chiang Rai, which typically includes Chiang Rai's population in addition to adjacent suburban areas.