The Archdiocese of Kota Kinabalu is a metropolitan archdiocese of the Latin Church of the Catholic Church in Sabah, Malaysia, on the island of Borneo. The archdiocese is the oldest ecclesiastical territory in Malaysia, with a long history slowly rising along with the Catholic population from a prefecture to an archdiocese. Its cathedral archepiscopal see is Sacred Heart Cathedral, Kota Kinabalu. The patron saint of the archdiocese is St. Joseph, Spouse of the Blessed Virgin Mary.