Matadi's 2026 population is now estimated at 484,778. In 1950, the population of Matadi was 59,672. Matadi has grown by 18,987 in the last year, which represents a 4.08% 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 Matadi, which typically includes Matadi's population in addition to adjacent suburban areas.