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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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
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
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A Baby Hand
40 Days for Life Toronto

Our mission is to organize a peaceful campaign of fasting and prayer...

Sep-25-2024 - Nov-03-2024
811 Lawrence Ave. W., Toronto
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
Friends posing for photo in front of sunset
Day Trip to London, Ont.

Day Trip to London, Ont. on Fri, Oct 18$70 per person...

Oct-18-2024 - Oct-18-2024
St. Peter's Cathedral in London & Surrounding Area
One Million Children Praying the Rosary Poster
One Million Children Praying the Rosary

One Million Children Praying the Rosary 2024: Participate! The international prayer campaign...

Oct-18-2024 - Oct-18-2024
Online at Microsoft Teams
Manresa Jesuit Spiritual Renewal Centre Logo
Men & Women Ignatian Retreat - Open Wide Our Doors - Pope Francis's insights on Mercy

Silent Ignatian Retreat for Men and Women. OPEN WIDE OUR DOORS. Pope...

Oct-18-2024 - Oct-20-2024
Manresa Jesuit Spiritual Renewal Centre
Round Stained Glass Dove
Life in the Spirit Seminar

Friday, October 18 – 7:30 to 9:30 p.m.Saturday...

Oct-18-2024 - Oct-20-2024
Burnhamthorpe Community Centre, 1500 Gulleden Dr., Mississauga
Altar Server Procession.jpg
Canonization of Blessed Joseph Allamano Mass

On Oct. 20, the world celebrates Mission Sunday, and on this special...

Oct-20-2024 - Oct-20-2024
St. Andrew's Parish, Etobicoke
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
Lamp at Night
Newman Centre Date Night Event

Date Night at the Newman Centre offers Catholic couples an opportunity to...

Oct-23-2024 - Oct-23-2024
Newman Centre Catholic Mission
Lamp at Night
St. Joseph's Centre of Hope for Women Gala Dinner

Fundraiser gala dinner for St. Joseph's Centre of Hope for Women...

Oct-23-2024 - Oct-23-2024
Royalton Banquet Hall, 8201 Weston Rd., Woodbridge
Shelf of books
Orthodoxy, Human Rights and Christian Politics Action

AN IN-PERSON EVENT RECOMMENDED BY THE OFFICE FOR PROMOTING CHRISTIAN UNITY...

Oct-23-2024 - Oct-23-2024
St. John the Compassionate Mission, 155 Broadview Ave., Toronto
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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