the school is located the along Birchwood Trail in Cobourg, about 95 kilometres (59 mi) east of Toronto.

St. Mary Catholic Secondary School was founded in 1984 and moved to its current site in September 1998.

The school’s current site was later expanded in 2005 with a new wing of twelve classrooms St Mary has a long history of athletic victories.

Sports teams at St. Mary have won OFSAA titles in rowing, badminton, swimming, rugby, and javelin.

[3] Students from St Mary School are often recipients of important academic[4] and athletic[5] awards.