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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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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Blessed Sacrament
Jubilee Year Closing Mass
Join us for the closing Jubilee Mass at St. Gregory the Great on December 28 at 9:30 am.
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Ecumenical Event
Ecumenical Worship Service
Ecumenical Worship Service at St. Gregory the Great in Oshawa
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Young Man Praying
SPIRITUS DURHAM YOUNG ADULT EVENT
Calling all Young Adults Ages 19–39! Spiritus Durham invites you to a special evening
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Dernières nouvelles
Coat of Arms of Frank Cardinal Leo
Cardinal Leo Affirms Concerns of Canadian Bishops re: Bill C-9
5 December 2025 My dear brothers and sisters in Christ, I write to you today to convey my...
Interior view of St. Gregory's looking toward the altar
SPIRITUS DURHAM YOUNG ADULT EVENT
Calling all Young Adults Ages 19–39! Spiritus Durham invites you to a special evening, “Angels...
Ecumenical Event
Ecumenical Worship Service
You are invited to join us at an ecumenical worship service during the 2026 Week of Prayer...
Tabernacle at St. Gregory with word "Salus" visible
Jubilee Year Closing Mass in each Archdiocesan Pilgrim Parish
Closing of the Jubilee Year at St. Gregory the Great   This December 28, 2025, we will close...
Événements
sick and suffering jan2026.jpg
Special Prayer Service for Sick and Suffering

We invite you to come and join us at Divine Retreat Centre...

Jan-17-2026 - Jan-17-2026
69 William Street Toronto, ON M9N 2G6
Rise Prayer Service
Young Adults Prayer Service

We warmly invite young adults aged 20 and above to join &ldquo...

Jan-17-2026 - Jan-17-2026
69 William Street Toronto, ON M9N 2G6
Armenian Cross
Annual Week of Prayer for Christian Unity Prayer Service 2026

AN IN-PERSON EVENT SPONSORED BY THE OFFICE FOR ECUMENICAL AND INTERFAITH...

Jan-18-2026 - Jan-18-2026
Runnymede United Church, 432 Runnymede Rd, Toronto
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Mental Health Retreat: Art night!

Join us on the evening of January 22 if you want to...

Jan-22-2026 - Jan-22-2026
Merciful Redeemer Parish
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Networking Workshop: Jesse Manibusan

EVANGELIZATION. PRAISE. WORSHIP. Cultivating a faith that's alive. Nothing new...

Jan-22-2026 - Jan-22-2026
Zoom Meeting - Zoom link will be sent upon registration
A Bible opened on a table with a rosary laying on top of it
CATHOLICISM - a Journey Around the World and Deep Into the Faith

This event starts January 22 and ends on March 26.  The...

Jan-22-2026 - Jan-22-2026
St. Gertrude's Parish, 690 King St Oshawa OR Zoom
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Dinner and a Movie with Ignite Ministry

Join Ignite for Dinner and a Movie!Ignite! Young Adult Ministry (age...

Jan-23-2026 - Jan-23-2026
131 McCaul Street
Peaceful nature scene
Men Silent Retreat: Pilgrims of Hope: Guided by the Past, Inspired by the Future.

Men Ignatian Retreat: As people of faith, we journey together as pilgrims...

Jan-23-2026 - Jan-25-2026
Manresa Jesuit Spiritual Renewal Centre
hands holding the rosary
Ontario Baraga Day 2026 - Mass at Our Lady of the Miraculous Medal

Join us for Baraga Day in Ontario on Sunday, January 25, 2026...

Jan-25-2026 - Jan-25-2026
Our Lady of the Miraculous Medal Church, 739 Browns Line, Toronto
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Day of Reflection - Eucharist -- Church. Where We Learn A Spirituality of Encounter & Service.

Day of Reflection for Men/Women: We will reflect and pray on...

Jan-26-2026 - Jan-26-2026
Manresa Jesuit Spiritual Renewal Centre
Holocaust Remembrance Day
International Holocaust Memorial Day Ceremony

AN IN-PERSON EVENT SPONSORED BY THE OFFICE FOR ECUMENICAL AND INTERFAITH...

Jan-27-2026 - Jan-27-2026
Darchei Noam Congregation 864 Sheppard Ave. W.
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Women Silent Ignatian Retreat - "To Know. To Love. To Serve. An Ignatian Way of Following the Lord."

Women Ignatian Retreat: We feel the desire to follow the Lord, to...

Jan-30-2026 - Feb-01-2026
Manresa Jesuit Spiritual Renewal Centre
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Visitez-nous
194 Simcoe Street North
Oshawa, ON
L1G 4S9

 Bureau/Adresse postale
194 Simcoe Street North
Oshawa, ON
L1G 4S9

t:  905.723.8141
e:  stgregorythegreat@archtoronto.org

Obtenir l'itinéraire
Clergé
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 . . .
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Building Family Life
The power of God's love in couple and family life.
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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
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