Mbuji-Mayi's 2025 population is now estimated at 3,158,340. In 1950, the population of Mbuji-Mayi was 67,641. Mbuji-Mayi has grown by 135,480 in the last year, which represents a 4.48% 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 Mbuji-Mayi, which typically includes Mbuji-Mayi's population in addition to adjacent suburban areas.