Our Parish


At St. John XXIII Catholic School, we work in partnership with our local parish to strengthen our Catholic beliefs.

St. Gregory the Great Parish Catholic Church
194 Simcoe St. N.
Oshawa, ON L1G 4S9

Tel: 905-723-8141
Fax: 905-723-3116
Email: secretary@stgregorythegreat.ca 

Pastor: Rev. Robert O'Brien

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