St. Demetrius Church serves Toronto's Orthodox Christian community through worship, sacraments, and spiritual guidance. The church celebrates the Divine Liturgy according to Orthodox tradition and provides pastoral care to parishioners seeking to deepen their faith. Beyond worship, the congregation engages in charitable outreach, community education about Orthodox Christianity, and support for members during significant life transitions. The church maintains a library of theological resources and hosts educational programs exploring Orthodox theology, history, and practice. St. Demetrius also participates in interfaith dialogue and collaborates with other religious organizations across Toronto to promote spiritual understanding and community solidarity among different faith traditions.