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.
Read More
Interior vew of St. Gregory's Church facing the sanctuary
Mass Schedule
Mass Times and Confession Times
Read More
Image of the Facade of St. Gregory the Great
Parish Financial Report
Financial information for 2023
Read More
Archbishop Leo
Archbishop's visit, 2024
Archbishop's visit to St Gregory and Holy Cross
Read More
with priests and deacons
Jubilee Mass
The Jubilee Mass on January 29, 2025, at St. Gregory the Great
Read More
Latest News
Coat of Arms of Frank Cardinal Leo
Message for Lent 2025 from His Eminence Frank Cardinal Leo
Lenten Message 2025His Eminence Frank Cardinal LeoMetropolitan Archbishop of Toronto   My Dear Brothers and Sisters, May Jesus...
Hope
The Jubilee Year Mass
The Jubilee Mass on January 29, 2025, at St. Gregory the Great The last time St. Gregory the...
Image of Front Doors of St. Gregory the Great from outside
Festival of Faith at St George Anglican church in Oshawa
Festival of Faith at St George Anglican church in Oshawa on February 15, 2025. Pastor of St. George...
Theology of the Body
Natural Family Planning
Helping married couples live out the teachings of the Catholic Church  (https://bit.ly/NFP-Brochure-OFD...
Events
Monstrance Black Background
24 hours for the Lord

Join St. Basil’s and St. Mike's Campus Ministry for...

Apr-04-2025 - Apr-05-2025
St. Basil's Church, 50 St. Joseph St.
Image of flowers
Silent Ignatian Retreat for Women - A Feminine Evolution and Embrace of Ignatian Spirituality

From the very beginning of the spiritual transformation of St. Ignatius of...

Apr-04-2025 - Apr-06-2025
Manresa Jesuit Spiritual Renewal Centre Pickering
Jesus on the Cross Shadowed
Joy in Lent? Day of Recollection with Fr. Donald Raila OSB

In contrast to the emotion of happiness, Christian joy, as a gift...

Apr-05-2025 - Apr-05-2025
Holy Rosary Parish, Toronto
Open bible
Jubilee of Hope 2025: Portuguese Day of Prayer in Oakville

“Jubilee of Hope 2025: Portuguese Day of Prayer in Oakville&rdquo...

Apr-05-2025 - Apr-05-2025
St. Joseph's Parish, 2451 Old Bronte Rd. N., Oakville
Votive Candles
Lenten Retreat 2025

Queen of Apostles Renewal Centre invites all to Our 2025 Lenten retreat...

Apr-05-2025 - Apr-05-2025
1617 Blythe Rd., Mississauga
Office for Promoting Christian Unity & Religious Relations with Judaism Logo
Festival of Faith for Christian Unity 2025: Creation as God’s Work

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

Apr-05-2025 - Apr-05-2025
Northlea United Church
Shelf of books
Responding to Crisis: Reparative Reasoning in Judaism, Christianity, and Islam

AN ONLINE EVENT RECOMMENDED BY THE OFFICE FOR PROMOTING CHRISTIAN UNITY AND...

Apr-06-2025 - Apr-07-2025
Online
Office for Promoting Christian Unity & Religious Relations with Judaism Logo
One Body, Many Parts: The Work of the Body

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

Apr-06-2025 - Apr-06-2025
St. Luke’s Roman Catholic Church, 39 Green Ln.
Holding Hands
Religious and Spiritual Aspects of Suffering

The Canadian Catholic Bioethics Institute presents a free webinar: Religious and Spiritual...

Apr-09-2025 - Apr-09-2025
Online
Stained Glass Mary
Consecration to Jesus through Mary on May 13, 2025

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

Apr-10-2025 - May-13-2025
Our Lady of Fatima Parish, 101 Malta Ave., Brampton
The Source - Holy Hour
The Source - Holy Hour with Music

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

Apr-10-2025 - Apr-10-2025
St. Peter's Church, 840 Bathurst Street, Toronto
This is Jesus Passion Play Poster
This Is Jesus: A Musically Immersed Passion Play

THIS IS JESUS: A Musically Immersed Passion Play (Produced by St. Padre...

Apr-11-2025 - Apr-13-2025
St. Padre Pio, 5500 Major Mackenzie Dr., Kleinburg
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.

Contact the Parish
Please enter a valid name
Please enter a valid email address
Please enter a valid message
Retype the CAPTCHA code from the image
Change the CAPTCHA codeSpeak the CAPTCHA code