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 2024
Financial information for 2024
Read More
Ecumenical Event
Ecumenical Worship Service
Ecumenical Worship Service at St. Gregory the Great in Oshawa
Read More
Young Man Praying
SPIRITUS DURHAM YOUNG ADULT EVENT
Calling all Young Adults Ages 19–39! Spiritus Durham invites you to a special evening
Read More
Blessed Sacrament
Holy Week Schedule for St. Gregory's & Holy Cross, 2026
Holy Week Schedule for St. Gregory's & Holy Cross - Confession and Celebration timings.
Read More
Latest News
Closeup image of Christ's face while on the Cross in painting in sanctuary
Communication from Cardinal: Holy Week
As we prepare for Holy Week, please find the following two messages (attached) from Cardinal Leo:   Holy...
Crucifix on Blurred sky background
Holy Week Schedule for St. Gregory's & Holy Cross
Lenten Confessions: Holy Cross Parish – 373 Simcoe Street South Thursday March 26th 4:00 p.m...
Interior view of St. Gregory's looking toward the altar
Special Jubilee Year of St. Francis
Please find the attached letter from Cardinal Leo on Celebrating the Special Jubilee Year of St. Francis. Special...
Empty Church with Cross and Ambo draped in purple
Cardinal Leo - Lenten Message 2026
My Dear Brothers and Sisters,May Jesus and Mary be in your hearts.As we enter into the...
Events
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