The Roman Catholic Diocese of Helsinki is a diocese of the Latin Rite of the Roman Catholic church based in Helsinki, which comprises the whole of Finland. The diocese is divided into seven parishes, including Oulu which covers almost all of the northern part of Finland.
The current Roman Catholic Bishop of Helsinki is Teemu Sippo, S.C.I., the first ethnic Finn to hold the office since its reestablishment after the Reformation (previous bishops included three Dutch and a Pole).