The Roman Catholic Diocese of Mongomo is a Latin Catholic suffragan bishopric in the ecclesiastical province (covering all Equatorial Guinea) of the Metropolitan Archdiocese of Malabo, yet depends on the missionary Roman Congregation for the Evangelization of Peoples.
Its cathedral episcopal see is a minor basilica, the Catedral Basílica de la Inmaculada Concepción, dedicated to the Immaculate Conception, in Mongomo, Wele-Nzas province, Región Continentale.[1]