Valenciennes's 2021 population is now estimated at 338,848. In 1950, the population of Valenciennes was 288,487. Valenciennes has grown by 771 since 2015, which represents a 0.23% 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 Valenciennes, which typically includes Valenciennes's population in addition to adjacent suburban areas.