Katolska kyrkan i Trollhättan serves the Catholic community in the surrounding areas, including Uddevalla, Vänersborg, Norra Bohuslän, and Dalsland. As part of the Sankt Petri Catholic Parish, the church offers a variety of religious services and masses, including special celebrations during Christmas. The organization plays a significant role in the spiritual life of its parishioners, providing resources and guidance to support their faith.
In addition to regular worship services, Katolska kyrkan i Trollhättan engages in community outreach and support initiatives. The church hosts events and activities designed for all age groups, fostering a sense of fellowship among community members. Through these efforts, the church promotes Catholic teachings and traditions, encouraging participation and involvement within the local community.