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.
Placeholder (Rotator)
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 Thanksgiving
Message for Thanksgiving12 October 2026His Eminence Frank Cardinal LeoMetropolitan Archbishop of Toronto My Dear Brothers and Sisters, May...
Frank Cardinal Leo on Bill C-218
Bill C-218 Vote on October 7 - Cardinal Leo Asks MPs to Support Private Members’ Bill
Canadian Members of Parliament are scheduled to vote on Bill C-218 at second reading on Wednesday, October...
A pair of orange and yellow flowers
Shape DCDSB’s New Multi-Year Strategic Plan
As we begin developing the Durham Catholic District School Board’s (DCDSB) next Multi-Year Strategic Plan...
Purple flowers in full bloom
The Solemnity of St. Michael, Our Patron
Cardinal Leo’s Message for the Solemnity of St. Michael the Archangel As we prepare to celebrate...
Events
Magnifica Humanitas
Magnifica Humanitas: Encyclical Reading Group

A HYBRID EVENT RECOMMENDED BY THE OFFICE FOR ECUMENICAL AND INTERFAITH RELATIONSThis...

Sep-14-2026 - Dec-09-2026
Hybrid
Holy Trinity Statue
Windows on Theology: Remembering the Trinity: Exploring the Source and Summit of Life

Presented by Gordon Rixon, SJDate: Sept. 16, Sept. 30, Oct. 7, Oct...

Sep-16-2026 - Nov-04-2026
Regis College
Stock Image - Bill Wittman
Interreligious Spirituality Groups

AN ONLINE EVENT RECOMMENDED BY THE OFFICE FOR ECUMENICAL AND INTERFAITH RELATIONSThe...

Oct-01-2026 - Jun-30-2027
Online
Bible and Beer
Ignite - Bible & Beer - Oct 13

Bible & Beer Series!Ignite! Young Adult Ministry (ages 18–39...

Oct-13-2026 - Oct-13-2026
St. Patrick's Church - 137 McCaul Street
Fall
Men & Women Ignatian Retreat: "How Can I Keep from Singing."

Ignatian Retreat for Men & Women: In a turbulent world and often...

Oct-16-2026 - Oct-18-2026
Manresa Jesuit Spiritual Renewal Centre
St. Augustine's
Spirit & Life: A Catholic Guide to Medical Treatment Decisions at the End of Life

Join us for Spirit & Life: A Catholic Guide to Medical Treatment...

Oct-17-2026 - Oct-17-2026
2661 Kingston Rd., Scarborough
Man kneels in church while praying the rosary
Windows on Theology: The Book of Job: Where Ethics & Aesthetics Clash : Session 2

Windows on Theology: The Book of Job: Where Ethics & Aesthetics Clash...

Oct-17-2026 - Oct-17-2026
Online
Peaceful Scene
Silent Ignatian Retreat for Women: Christmas Already!

Ignatian Retreat for Women: Hebrews 1:1. ‘In times past...

Oct-23-2026 - Oct-25-2026
Manresa Jesuit Spiritual Renewal Centre
BLD Logo Circular
BLD Toronto Marriage Encounter Weekend

The BLD Marriage Encounter Weekend is a beautiful opportunity for married couples...

Oct-24-2026 - Oct-25-2026
The VMOG 953376 7th Line E, Orangeville ON L9W 2Z2
FallChapel-Grounds
Day of Reflection for Men & Women with Fr. Michael Coutts, SJ

Day of Retreat: Where the Hell is God? Tracey Leonard, a nurse...

Oct-26-2026 - Oct-26-2026
Manresa Jesuit Spiritual Renewal Centre
Candle with flowing water
Dialogue & Understanding: Creation for the Common Good

AN ONLINE MINI-COURSE RECOMMENDED BY THE OFFICE FOR ECUMENICAL AND INTERFAITH...

Oct-26-2026 - Nov-09-2026
Online
Chapel
Silent Ignatian Retreat for Men: Living with an Open Door: Seeing Life Through God's Bigger Picture

Ignatian Retreat for Men: "See, I have set before you an open...

Oct-30-2026 - Nov-01-2026
Manresa Jesuit Spiritual Renewal Centre
Video Block
You can source and display any video in this block from YouTube or Vimeo. It can be a Mass, reflection or promotional video for an event at your parish or the Archdiocese
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 . . .
More Info
Building Family Life
The power of God's love in couple and family life.
More Info
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.

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