St. Mary Catholic Secondary School
🇨🇦 Official data · 2025Cobourg, Ontario K9A5S9 · Peterborough Victoria Northum Clarington CDSB
#382 of 766 secondary schools in Ontario
#382 of 766 nationally
About St. Mary Catholic Secondary School
St. Mary Catholic Secondary School is a catholic secondary located in Cobourg, in the Peterborough Victoria Northum Clarington CDSB school board or district of Ontario, Canada. It caters for Grades 9-12. In 2025 it enrolled 835 students. Publicly funded Catholic (separate) school boards in Ontario; free to attend.
Its Success Index (Canada) is 50.7 out of 100, placing it in the top 50% of secondary schools in Canada and 382nd of 766 ranked secondary schools in Ontario. Its strongest component is parent education (fewer parents without a credential) (81th percentile), and its weakest is osslt first-attempt pass rate (18th percentile).
Other published figures: enrolment 835; first language not english 3%; special education 28%; identified as gifted 0%.
There are 15 schools in Cobourg; St. Mary Catholic Secondary School ranks 8th of 11 scored schools there.
Success Index (Canada) breakdown
Each component is a percentile against secondary schools across Canada.
- EQAO Grade 3 (reading, writing, maths) (20%)–
- EQAO Grade 6 (reading, writing, maths) (25%)–
- EQAO Grade 9 mathematics (25%)57%
- OSSLT first-attempt pass rate (20%)75%
- FSA literacy score (25%)–
- FSA numeracy score (25%)–
- Community advantage (fewer low-income households) (10%)6%
- Parent education (fewer parents without a credential) (10%)1%
The Success Index (Canada) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for St. Mary Catholic Secondary School by the official sources.
- Enrolment
- 835
- Students enrolled in the latest published year.
- EQAO Grade 9 maths
- 57%
- % at or above the provincial standard in Grade 9 mathematics.
- OSSLT pass rate
- 75%
- % passing the Grade 10 literacy test on the first attempt.
- Low-income households
- 6%
- % of students living in low-income households.
- Parents without a credential
- 1%
- % of students whose parents have no degree, diploma or certificate.
- First language not English
- 3%
- % of students whose first language is not English.
- Special education
- 28%
- % of students receiving special education services.
- Identified as gifted
- 0%
- % of students identified as gifted.
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Schools near St. Mary Catholic Secondary School
Closest schools by straight-line distance, with their Success Index (Canada).
St. Joseph Catholic Elementary School
Cobourg · Catholic elementary · Grades JK-8
200 students · 674 m away
Centre for Individual Studies Northumberland
Cobourg · Public alternative · Grades 9-12
115 students · 942 m away
Terry Fox Public School
Cobourg · Public elementary · Grades JK-8
390 students · 2.0 km away
St. Michael Catholic Elementary School
Cobourg · Catholic elementary · Grades JK-8
160 students · 2.2 km away
C R Gummow Public School
Cobourg · Public elementary · Grades JK-8
795 students · 2.3 km away
Notre Dame Catholic Elementary School
Cobourg · Catholic elementary · Grades JK-8
155 students · 2.4 km away
Burnham Public School
Cobourg · Public elementary · Grades JK-6
275 students · 2.6 km away
Cobourg Collegiate Institute
Cobourg · Public secondary · Grades 9-12
1,110 students · 2.7 km away
Merwin Greer Public School
Cobourg · Public elementary · Grades JK-6
130 students · 3.0 km away
Dale Road Sr. Public School
Cobourg · Public elementary · Grades 7-8
175 students · 4.3 km away
Similar schools
Catholic secondary schools in Ontario with a comparable Enrolment.
John Cabot Catholic Secondary School
Mississauga · Catholic secondary · Grades 9-12
835 students
Holy Cross Catholic Secondary School
Peterborough · Catholic secondary · Grades 9-12
840 students
Regiopolis/Notre-Dame Catholic High School
Kingston · Catholic secondary · Grades 9-12
825 students
École secondaire catholique Mer Bleue
Orléans · Catholic secondary · Grades 9-12
825 students
St Oscar Romero Catholic Secondary School
Toronto · Catholic secondary · Grades 9-12
825 students
Catholic Central
Windsor · Catholic secondary · Grades 9-12
845 students
Frequently asked questions
Is St. Mary Catholic Secondary School a good school?
St. Mary Catholic Secondary School has a Success Index (Canada) of 50.7 out of 100 (Top 50% of secondary schools in Canada) and ranks #382 of 766 in Ontario. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does St. Mary Catholic Secondary School rank in Ontario?
St. Mary Catholic Secondary School ranks #382 of 766 secondary schools in Ontario and #382 of 766 nationally on the Success Index (Canada) (2025 data).
How many students attend St. Mary Catholic Secondary School?
St. Mary Catholic Secondary School had 835 students in 2025.
Is St. Mary Catholic Secondary School a elementary school or a secondary school?
St. Mary Catholic Secondary School is classified as a secondary covering Grades 9-12. It is a catholic school.
What other schools are near St. Mary Catholic Secondary School?
There are 10 schools within 15 km of St. Mary Catholic Secondary School; they are listed on this page with their Success Index (Canada) and distance, and can be compared side by side.