St.Mary's Syrian Orthodox Church was established in the year of 1983. In August 1983 with the consent of the late Archbishop H. E Mor Athanasius Y. Samuel of the North American Archdiocese, St.Mary's Syrian Orthodox church was established. Late H. G. Thomas Mor Dionysius (H. B Baselios Thomas1, Catholicose of the East) assisted by very Rev Fr. Jos Thomas, conducted the first Holy Qurbana of this new Parish.

From 1987 - 1994, Fr. Thomas Varghese Kanneth served as the first resident Vicar of the Church

The inaugural service of the new parish was conducted by Rev. Fr. Estephanos Ramban of the St. Barsaumo Syriac Orthodox Church. Our first Church Constitution was adopted in 1989 under "St. Mary's Syrian Orthodox Church of Canada". We also became a Revenue Canada Registered Charity in 1991 and an Ontario Charitable Corporation in 2002.

Between 1994 and 1996, priests from the United States conducted 
services once or twice per month.

In 1996/ 1997, Rev Fr. V.V Paulose served as the 
resident Vicar. Fr. Paulose, with the first sizable donation and encouragement of 
Mr. Jacob Kuzhikattil initiated the idea of having our own Parish building.

Mr. Jacob Kuzhikkattil initiated the idea of having our own Parish building with a considerable donation and encouragement. With God's leading, this was realized with the aid of the growing congregation and other well wishers when the present church was bought on Kenmuir Avenue, Mississauga on March 6th, 1998.  The inaugural  service in the new Parish Building was conducted by Rev. Fr. Estephanos (Ramban) 
from St. Barsaumo Syriac Orthodox Church. Our first Church Constitution was adopted in 1989 under “St. Mary’s Syrian Orthodox Church of Canada”.  We became a Revenue Canada Registered Charity in 1991 
and an Ontario Charitable Corporation in 2002.  

Very Rev. Fr. Jos Thomas from Buffalo was appointed as the Vicar of this Parish on or about 4th April 1998, who continued to serve this Church until June 30th 2003. Fr. Joy John from 
USA was then appointed as our new Vicar effective July 1, 2003. 

Fr. Ephraim from the Middle Eastern Syrian Church had also conducted the services when Fr. Joy was not available

When Fr. Joy was not available. Fr. James Scaria (Now H.G. Mathew Mor Aphrem) 
was appointed as Vicar in 2004, but decided to go back to India in 2005 

Fr. Prince Mookkanottil was then appointed in 2005 until May 2007

Kandanad Diocese Bishop Mathews Mor Ivanious visited our Church.  From 
May 2007 the services were conducted by various visiting Priests. Fr. Cheriyan 
Kooliyattu was appointed in October 2007and continued until May 2011.

Silver Jubilee in August 2008 with H. G Joseph Mor Gregorios as 
the Chief Celebrant. It is also the only Malankara Syrian Orthodox Church 
in Canada under the St. Mary’s Name.
 

Bishop Joseph Mor Greegorious Visited In Our Church . 
Archbishop Yeldho Mor Titus Visited and Kickoff the fund  Raising of Diocese Office Building

Fr. Abey Mathew took over as the the Vicar from June 2011 to January 2022.

Bishop Kuriakose Mor Theophilose & Bishop Yeldho Mor Titus visited our Church in this Year

Bishop Kuriakose Mor Theophilose visited our church and Fund Raising started for New Church Property

The church was outgrowing its current capacity and was looking for a bigger facility for the growing congregation.  In 2018, a suitable place was  found at 2521 Tedlo Street,  Mississauga. 
The property was closed on February 18th and the congregation was moved to the basement of the building .  
Bishop Markose Mor Crisostamos visited in our Church
 

 Bishop Yeldho Mor Titus visited our Church in this Year for our Perunnal

Bishop Issac Mor Ostatious visited our Church in this Year for our Perunnal

2018 March 01 and 02 New Church building was consecrated by the Archbishop H.E Yeldho Mor Titus and there after conducting its regular service.
Bishop Geevarghese Mor Coorilos visited our Church for Perunnal.

Fr. Manu Mathew  was appointed our Vicar in February 2022. 
Bishop Abraham Mor Severious visited our Church.  
Bishop Yeldho Mor Titus  Visited in our church and Ordinated Deacon Manu Mathew

Bishop Yeldho Mor Titus  Visited in our church for Good Friday Service 

 HIS HOLINESS MORAN MOR IGNATIUS APHREM II 
  Supreme head of the Universal Syrian Orthodox Church , Apostolic See of Antioch and all the East 
and Diocesan Arch Bishop: H.G. Yeldo Mor Theethose First time in Canada Holy Father visited in In our
     Church for the Perunnal August 16 and 17 with Our Archbishop H.G. Yeldo Mor Theethose.

His Beatitude Aboon Mor Baselios Joseph, visited our Church and Conducted Holy Qurbana with, Arch Bishop: H.G. Yeldo Mor Theethose