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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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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Totus Tuus Summer Camp
Totus Tuus Summer Camp 2025
Totus Tuus Summer Camp is back at St. Gregory’s Parish
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POPE FRANCIS
Novena for Pope Francis
9 Days Novena Prayer for Pope Francis
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Latest News
Food Security Grants 2025
Catholic Community Commits $800,000 to Fight Hunger
As food insecurity worsens across the GTA, the Catholic community is responding with its largest-ever contribution to...
Image of Sacred Heart in stained glass
Message from Cardinal Leo on the Month of the Sacred Heart of Jesus
Message on the Month of the Sacred Heart of JesusHis Eminence Frank Cardinal LeoMetropolitan Archbishop of Toronto 1...
Summer camp
Totus Tuus
Totus Tuus Summer Camp is back at St. Gregory’s Parish   The Totus Tuus faith-based...
A pair of orange and yellow flowers
Catholic Education Week May 4-9, 2025
Catholic Education Week will take place this year throughout Ontario from May 4-9, 2025.Attached you will...
Events
Video Block
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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
stgregorythegreat@archtoronto.org
905-723-8141

Looking down a trail strewn with pine needles in a forest
Pandemic Journal
Listening to the quiet voice of Our Lord . . .
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Building Family Life
The power of God's love in couple and family life.
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A pair of orange and yellow flowers


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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