Kingston's 2026 population is now estimated at 607,664. In 1950, the population of Kingston was 278,076. Kingston has grown by 3,894 in the last year, which represents a 0.64% 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 Kingston, which typically includes Kingston's population in addition to adjacent suburban areas.