Diulu is a commune of the city of Mbuji-Mayi in the Kasaï-Oriental Province in the Democratic Republic of the Congo.
It is one of five communes in Mbuji-Mayi, along with Bipemba, Dibindi, Kanshi and Muya. It is the smallest of the Mbuji-Mayi communes both by area, at , and by population. It is separated by a ravine from the commune of Bipemba, with a road bridge connecting the communes opened in 2025.
The main campus of the is located in the commune. Illegal diamond mining also takes place in residential parts of the commune.
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