The Cathedral is the main church of the Helsinki Cathedral parish and Helsinki Diocese. The annual ecumenical opening and closing services of the Parliament, as well as the Independence Day service, take place there. Furthermore, it serves the University of Helsinki and other institutes of higher education, by organising degree ceremony services.
The Cathedral is also a popular festive, concert and wedding church. The church and its events are visited by 500,000 people from different parts of the world annually. The church is used for services and concerts every day of the week.