The Roman Catholic Diocese of Kongolo (Latin: Kongoloën(sis)) is a Latin suffragan diocese in the ecclesiastical province of Lubumbashi in the Democratic Republic of the Congo.
Its cathedral episcopal see is Cathédrale Sacré-Coeur-de-Marie (dedicated to Our Lady's Heart) in the city of Kongolo.
(all Roman rite) (So far all but one are members of the Holy Ghost Fathers (C.S.Sp.).)