St. Sunniva Church was consecrated on 20 August 1893 and has since been an important religious gathering point in the region. The church was reconsecrated on 21 March 1976, marking a significant milestone in its history. The parish covers southern Troms and northern Nordland, and includes several municipalities such as Harstad, Kvæfjord, Skånland and Bjarkøy.
The congregation is active in sharing information with its members and has a blog that is updated regularly. The church offers mass times and weekly readings, which provide opportunities for worship and reflection in everyday life. St. Sunniva Church has also been affected by the fire in the parish hall, which has affected the activities of the congregation.