Tabernacle at St. Gregory with word "Salus" visible
First Communion Program
Find out details of our parish's program for preparation for First Holy Communion and Reconciliation.
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Confirmation Program
Find out more about our parish's program for the preparation for the Sacrament of Confirmation.
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Letters of Reference
Letters of Reference for Catholic Teacher Applicants
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Sacrament of Baptism
Find out more about preparing for the Sacrament of Baptism for your child.
Tabernacle at St. Gregory with word "Salus" visible
Mass Schedule
Sunday 8am and 9:30am. Tuesday 12.10pm and  Friday 7pm.
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Confession Schedule
Confession: Friday 6:00 pm -6:45 pm.
Latest News
Archbishop Leo
Pope Francis Elevates Archbishop Francis Leo to the College of Cardinals
Pope Francis has announced that Metropolitan Archbishop of Toronto, the Most Rev. Francis Leo will be elevated to...
Image of Sacred Heart in stained glass
The Mystery of God
What? The Mystery of God: Who God Is and Why He Matters Who & why? We...
POPE FRANCIS
Youth Pilgrimage 2025
Jubilee of Youth  2025  Pilgrimage - From July 23, 2025 to August 5, 2025 Youth Pilgrimage Poster...
Marriage
Marriage Prep Course at St. Leo the Great Catholic Church
About our marriage prep course that will be taking place at St. Leo the Great Catholic Church...
Events
Bible and Coffee at Lake
Diving Deeper into Our Faith – Adult Formation Program

Are you interested in learning more about our Catholic faith? Do you...

Sep-18-2024 - Apr-02-2025
St. Peter's Church, 840 Bathurst St.
Fountain pen on notebook
Unlocking the Mystery of the Bible

Beginning on Thursday, Oct. 17 at 7 p.m., our fall Bible...

Oct-17-2024 - Dec-05-2024
St. Gertrude's Parish, 690 King St., Oshawa or Zoom
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Be Filled Seminar

The Shalom Catholic Community is a vocation within the Catholic Church. In...

Oct-19-2024 - Nov-30-2024
879 St Clair Ave. W., Toronto
Shelf of books
Bible Study on the Book of Prophet Jeremiah

The Mustard Seed Ministry, the Parish Adult Faith Formation Program of St...

Oct-21-2024 - Jun-23-2025
Virtual event via Zoom
Mary and Jesus
Consecration to Jesus Through Mary on Dec. 12, 2024

Everyone is invited to consecrate themselves to Jesus through Mary (or to...

Nov-09-2024 - Dec-12-2024
Our Lady of Guadalupe Parish, 694 Weston Rd., Toronto
Three People Sitting and Reading
Diving Deeper into Our Faith – Adult Faith Formation Second Series

All are welcome to attend the second of a four-part series...

Nov-13-2024 - Dec-04-2024
St. Peter's Church, 840 Bathurst St.
The Source - Holy Hour
The Source - Holy Hour with Music

Join the Sisters of Life and the Office of Catholic Youth for...

Nov-21-2024 - Nov-21-2024
St. Peter's Church, 840 Bathurst Street, Toronto
Manresa Jesuit Spiritual Renewal Centre Logo
A silent Ignatian Retreat for Men & Women - God’s Mother Mary: First Disciple of the Lord Jesus Christ

God’s Mother Mary: First Disciple of the Lord Jesus Christ...

Nov-22-2024 - Nov-24-2024
Manresa Jesuit Spiritual Renewal Centre
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RENEW Toronto 2024

🎉 Get Ready for RENEW Toronto! 🎉 Join us on Saturday, November 23 and...

Nov-23-2024 - Nov-24-2024
Canada Event Centre, 300 Water St., Whitby
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The Great Pain of Grief Retreat

Blessed Trinity Parish welcomes Deacon Curtis Boone and the Side by Side...

Nov-23-2024 - Nov-23-2024
Blessed Trinity Parish
Elderly Lady Looking Out Window
Palliative Care: The Better Choice

The deVeber Institute presents a free, in-person lecture on palliative care...

Nov-23-2024 - Nov-23-2024
All Saints Parish, Etobicoke
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Day of Reflection - Welcoming the Incarnation with Mary Bastedo, M.Div

Day of Reflection – Advent invites us to a place of deep...

Nov-25-2024 - Nov-25-2024
Manresa Jesuit Spiritual Renewal Centre
Proclaiming Christ
Listening to the Voice of God and Following Through
Visit Us
194 Simcoe Street North
Oshawa, ON
L1G 4S9

 Office/Mailing Address
194 Simcoe Street North
Oshawa, ON
L1G 4S9

t:  905.723.8141
e:  stgregorythegreat@archtoronto.org

Get Directions
Clergy
Rev. Marijan Sisko
Pastor

Rev. Edward McGovern
Hospital Chaplain

Deacon David MacInnis
Deacon Assistant

Parish Staff
Jacqui Martin
Secretary
secretary@stgregorythegreat.ca
905-723-8141



Living Our Baptism in Our Parish
Help to build up the life we have received in Christ by sharing the gifts you have received: In Christ's Spirit, Through your human talents, and with your material resources.
Prayer
Join in prayer in new ways with others.
Human Gifts and Service
Use your gifts to build up the life of the Gospel.
Material Support
Support the parish and charities who further the mission of Christ.

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