Douai-Lens's 2021 population is now estimated at 500,921. In 1950, the population of Douai-Lens was 533,572. Douai-Lens has grown by 145 since 2015, which represents a 0.03% 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 Douai-Lens, which typically includes Douai-Lens's population in addition to adjacent suburban areas.