St Mary Catholic Secondary School
🇨🇦 Official data · 2025Pickering, Ontario L1V1R9 · Durham CDSB
#143 of 766 secondary schools in Ontario
#143 of 766 nationally
About St Mary Catholic Secondary School
St Mary Catholic Secondary School is a catholic secondary located in Pickering, in the Durham CDSB school board or district of Ontario, Canada. It caters for Grades 9-12. In 2025 it enrolled 1,310 students. Publicly funded Catholic (separate) school boards in Ontario; free to attend.
Its Success Index (Canada) is 72.8 out of 100, placing it in the top 25% of secondary schools in Canada and 143rd of 766 ranked secondary schools in Ontario. Its strongest component is community advantage (fewer low-income households) (84th percentile), and its weakest is eqao grade 9 mathematics (64th percentile).
Other published figures: enrolment 1,310; first language not english 7%; special education 20%; identified as gifted 0%.
There are 34 schools in Pickering; St Mary Catholic Secondary School ranks 7th of 26 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%)61%
- OSSLT first-attempt pass rate (20%)92%
- FSA literacy score (25%)–
- FSA numeracy score (25%)–
- Community advantage (fewer low-income households) (10%)5%
- Parent education (fewer parents without a credential) (10%)2%
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
- 1,310
- Students enrolled in the latest published year.
- EQAO Grade 9 maths
- 61%
- % at or above the provincial standard in Grade 9 mathematics.
- OSSLT pass rate
- 92%
- % passing the Grade 10 literacy test on the first attempt.
- Low-income households
- 5%
- % of students living in low-income households.
- Parents without a credential
- 2%
- % of students whose parents have no degree, diploma or certificate.
- First language not English
- 7%
- % of students whose first language is not English.
- Special education
- 20%
- % of students receiving special education services.
- Identified as gifted
- 0%
- % of students identified as gifted.
Free academic assessment
Is your child on track for EQAO and beyond?
Success Tutoring offers personalised English and math tutoring from Kindergarten to Grade 12. Start with a free online assessment and a clear plan for the year ahead.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Centres across NSW, VIC, QLD, WA, SA and ACT
Schools near St Mary Catholic Secondary School
Closest schools by straight-line distance, with their Success Index (Canada).
Gandatsetiagon Public School
Pickering · Public elementary · Grades JK-8
580 students · 398 m away
Highbush Public School
Pickering · Public elementary · Grades JK-8
810 students · 886 m away
Altona Forest Public School
Pickering · Public elementary · Grades JK-8
460 students · 1.1 km away
St Elizabeth Seton Catholic School
Pickering · Catholic elementary · Grades JK-8
625 students · 1.1 km away
William Dunbar Public School
Pickering · Public elementary · Grades JK-8
660 students · 1.4 km away
Dunbarton High School
Pickering · Public secondary · Grades 9-12
1,630 students · 1.6 km away
Vaughan Willard Public School
Pickering · Public elementary · Grades JK-8
335 students · 1.8 km away
Westcreek Public School
Pickering · Public elementary · Grades JK-8
570 students · 2.0 km away
St Isaac Jogues Catholic School
Pickering · Catholic elementary · Grades JK-8
535 students · 2.1 km away
St Monica Catholic School
Pickering · Catholic elementary · Grades JK-8
460 students · 2.3 km away
Similar schools
Catholic secondary schools in Ontario with a comparable Enrolment.
St. Thomas Aquinas Catholic Secondary School
Oakville · Catholic secondary · Grades 9-12
1,310 students
Catholic Central High School
London · Catholic secondary · Grades 9-12
1,310 students
Holy Trinity Catholic High School
Kanata · Catholic secondary · Grades 9-12
1,315 students
St. Ignatius of Loyola Catholic Secondary School
Oakville · Catholic secondary · Grades 9-12
1,300 students
Bishop Tonnos Catholic Secondary School
Ancaster · Catholic secondary · Grades 9-12
1,320 students
St. Stephen Catholic Secondary School
Bowmanville · Catholic secondary · Grades 9-12
1,300 students
Frequently asked questions
Is St Mary Catholic Secondary School a good school?
St Mary Catholic Secondary School has a Success Index (Canada) of 72.8 out of 100 (Top 25% of secondary schools in Canada) and ranks #143 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 #143 of 766 secondary schools in Ontario and #143 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 1,310 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.