Gaoxiong's 2025 population is now estimated at 1,565,860. In 1950, the population of Gaoxiong was 286,893. Gaoxiong has grown by 6,780 in the last year, which represents a 0.43% 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 Gaoxiong, which typically includes Gaoxiong's population in addition to adjacent suburban areas.