Roman Catholic Churches in Ontario

St. Denis Roman Catholic Church is a warm and welcoming, Christ-centred Catholic community that answers the call to know, love, and serve God by spreading the Gospel through words and actions.

St. Joseph's Ukrainian Catholic Church is a bilingual parish in Oakville committed to living the Gospel in a relevant way for both the young and adults, embracing a growing community of 500 families.

Our Lady of Mount Carmel Church is a Roman Catholic church serving the Windsor, Ontario community. The parish provides regular Mass, confession, religious education, and sacramental preparation for parishioners and visitors.

St. Patrick's Roman Catholic Church is dedicated to creating a welcoming community that embraces diverse cultures and fosters meaningful relationships in Christ. Their mission emphasizes hospitality and support for the marginalized.

St. Margaret's Church is a Catholic parish that serves the community of Thunder Bay, providing a center of worship and support for its members through various ministries and sacraments.

St. Agnes' Parish in Toronto seeks to embody the mission of Christ, welcoming all to seek Him together in community.

St. George Ukrainian Catholic Church welcomes people of all ages and backgrounds, aiming to provide comfort, healing, and hope through a rich Eastern Byzantine worship experience in both Ukrainian and English.

The Roman Catholic Diocese of Peterborough serves the spiritual needs of the Catholic community in Peterborough and surrounding areas, focusing on faith formation and community outreach.

St. Andrew's Catholic Church is a parish dedicated to providing spiritual guidance and community support, rooted in the traditions of the Catholic faith.

Queen of the Most Holy Rosary Parish is a small Roman Catholic church with a big heart, welcoming all people and striving to share the joy of the Gospel with the community.

St. Anthony of Padua Roman Catholic Church is a welcoming parish that invites all to join in their mission and community.

Immaculate Conception Roman Catholic Church strives to live the Gospel of Jesus Christ, following the example of St. Francis of Assisi and under the patronage of Mary. They emphasize community worship and service.

St. Dominic's Catholic Church in Mississauga is a vibrant faith community committed to living out the teachings of Christ through worship, education, and service.

St. Joseph's Roman Catholic Church is a Roman Catholic church serving the Brantford, Ontario community. The parish provides regular Mass, confession, religious education, and sacramental preparation for parishioners and visitors.

Basilica of Our Lady Immaculate Parish Office is a dedicated community focused on serving its parishioners and visitors with spirituality and support through various initiatives.

Holy Family Parish is one of the largest parishes in the Diocese of London, serving more than 4,500 families. Created July 9, 2006 by Bishop Ronald Fabbro, embracing the former clustered parishes of St. Joseph's and St. Pius X.

St. Hyacinth (Św. Jacek) is a Polish Roman Catholic parish in Ottawa dedicated to serving the Polish-speaking Catholic community. The parish emphasizes traditional Catholic sacraments, devotions, and community spiritual life.

St. Stephen's Chapel was a Catholic chapel in Toronto affiliated with the Archdiocese of Toronto that served the community for almost half a century. The chapel is now closed as of November 1, 2025.