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.
Image of Chrism Vial and Oil stock for use in anointing
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
John the Baptist closeup of small bronze
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.
Image of Sacred Heart in stained glass
Confession Schedule
Confession: Friday 6:00 pm -6:45 pm.
Latest News
Coat of Arms of Frank Cardinal Leo
Cardinal Leo's Message for Canada Day
Message of His Eminence Cardinal Frank LeoMetropolitan Archbishop of TorontoCanada Day – July 1, 2026 My Dear Brothers...
Soccer ball
A Warm Welcome to Visitors for the World Cup
As our city comes alive with the excitement of international soccer this summer, the Archdiocese of Toronto extends...
Canadian flag
Cardinal Leo's Message for Canada Day (July 1, 2026)
Message of His Eminence Cardinal Frank Leo Metropolitan Archbishop of Toronto Canada Day – July 1, 2026My Dear...
Image of Sacred Heart in stained glass
Archdiocese of Toronto Celebrates the Ordination of Four Priests
Four Journeys, One CallingArchdiocese of Toronto Celebrates the Ordination of Four Priests TORONTO, ON (May 7, 2026) ...
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
stgregorythegreat@archtoronto.org
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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