Loudi's 2021 population is now estimated at 663,765. In 1950, the population of Loudi was 5,847. Loudi has grown by 24,598 since 2015, which represents a 3.85% 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 Loudi, which typically includes Loudi's population in addition to adjacent suburban areas.