Matadi's 2021 population is now estimated at 402,397. In 1950, the population of Matadi was 59,672. Matadi has grown by 12,728 since 2015, which represents a 3.27% 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.