Niigata's 2021 population is now estimated at 801,982. In 1950, the population of Niigata was 159,000. Niigata has grown by -2,316 since 2015, which represents a -0.29% 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 Niigata, which typically includes Niigata's population in addition to adjacent suburban areas.