Xinzhu's 2026 population is now estimated at 470,241. In 1950, the population of Xinzhu was 46,438. Xinzhu has grown by 2,788 in the last year, which represents a 0.6% 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 Xinzhu, which typically includes Xinzhu's population in addition to adjacent suburban areas.