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.