Image of Front Door of St. Gregory's Church
Welcome to St. Gregory the Great
Welcome to St. Gregory's. Our church is located at the southwest corner of Adelaide and Simcoe Streets, in central Oshawa.
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Totus Tuus Summer Camp
Totus Tuus Summer Camp
Day program: grades 1-6, Monday to Friday 9am-2:30pm, July 08-12, 2024, St Gregory’s Hall Evening program: grades 7-12, Sunday to Thursday, 7pm-9pm, July...
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Interior vew of St. Gregory's Church facing the sanctuary
Mass Schedule
Mass Times and Confession Times
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Image of the Facade of St. Gregory the Great
Parish Financial Report
Financial information for 2023
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Archbishop Leo
Archbishop's visit, 2024
Archbishop's visit to St Gregory and Holy Cross
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Life Teen Camp
Life Teen Camp 2024
Each summer, our parish community collaborates with and hosts other parish's high schoolers and their leaders at Life Teen Camp
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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
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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