St Marcellinus Secondary School
🇨🇦 Official data · 2025Mississauga, Ontario L5W1L9 · Dufferin-Peel CDSB
#105 of 766 secondary schools in Ontario
#105 of 766 nationally
About St Marcellinus Secondary School
St Marcellinus Secondary School is a catholic secondary located in Mississauga, in the Dufferin-Peel CDSB school board or district of Ontario, Canada. It caters for Grades 9-12. In 2025 it enrolled 1,715 students. Publicly funded Catholic (separate) school boards in Ontario; free to attend.
Its Success Index (Canada) is 76.6 out of 100, placing it in the top 25% of secondary schools in Canada and 105th of 766 ranked secondary schools in Ontario. Its strongest component is community advantage (fewer low-income households) (84th percentile), and its weakest is parent education (fewer parents without a credential) (71th percentile).
Other published figures: enrolment 1,715; first language not english 21%; special education 17%; identified as gifted 1%.
There are 320 schools in Mississauga; St Marcellinus Secondary School ranks 23rd of 206 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%)68%
- OSSLT first-attempt pass rate (20%)91%
- 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 Marcellinus Secondary School by the official sources.
- Enrolment
- 1,715
- Students enrolled in the latest published year.
- EQAO Grade 9 maths
- 68%
- % at or above the provincial standard in Grade 9 mathematics.
- OSSLT pass rate
- 91%
- % 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
- 21%
- % of students whose first language is not English.
- Special education
- 17%
- % of students receiving special education services.
- Identified as gifted
- 1%
- % of students identified as gifted.
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Schools near St Marcellinus Secondary School
Closest schools by straight-line distance, with their Success Index (Canada).
Mississauga Secondary School
Mississauga · Public secondary · Grades 9-12
1,000 students · 597 m away
École élémentaire Le Flambeau
Mississauga · Public elementary · Grades JK-6
305 students · 988 m away
St Veronica Elementary School
Mississauga · Catholic elementary · Grades JK-8
260 students · 989 m away
David Leeder Middle School
Mississauga · Public elementary · Grades 6-8
720 students · 1.1 km away
St Julia Catholic Elementary School
Mississauga · Catholic elementary · Grades JK-8
305 students · 1.2 km away
Meadowvale Village Public School
Mississauga · Public elementary · Grades JK-6
380 students · 1.3 km away
St Gregory School
Mississauga · Catholic elementary · Grades JK-8
515 students · 1.7 km away
Britannia Public School
Mississauga · Public elementary · Grades JK-8
430 students · 2.0 km away
Derry West Village Public School
Mississauga · Public elementary · Grades JK-6
375 students · 2.1 km away
St. Barbara Elementary School
Mississauga · Catholic elementary · Grades JK-8
335 students · 2.9 km away
Similar schools
Catholic secondary schools in Ontario with a comparable Enrolment.
St Robert Catholic High School
Thornhill · Catholic secondary · Grades 9-12
1,705 students
St. Francis Xavier (9-12) Catholic School
Gloucester · Catholic secondary · Grades 9-12
1,665 students
St. Francis Xavier Catholic Secondary School
Milton · Catholic secondary · Grades 9-12
1,770 students
Holy Trinity Catholic Secondary School
Oakville · Catholic secondary · Grades 9-12
1,775 students
Cathedral High School
Hamilton · Catholic secondary · Grades 9-12
1,650 students
St. John Henry Newman Catholic Secondary School
Stoney Creek · Catholic secondary · Grades 9-12
1,640 students
Frequently asked questions
Is St Marcellinus Secondary School a good school?
St Marcellinus Secondary School has a Success Index (Canada) of 76.6 out of 100 (Top 25% of secondary schools in Canada) and ranks #105 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 Marcellinus Secondary School rank in Ontario?
St Marcellinus Secondary School ranks #105 of 766 secondary schools in Ontario and #105 of 766 nationally on the Success Index (Canada) (2025 data).
How many students attend St Marcellinus Secondary School?
St Marcellinus Secondary School had 1,715 students in 2025.
Is St Marcellinus Secondary School a elementary school or a secondary school?
St Marcellinus Secondary School is classified as a secondary covering Grades 9-12. It is a catholic school.
What other schools are near St Marcellinus Secondary School?
There are 10 schools within 15 km of St Marcellinus Secondary School; they are listed on this page with their Success Index (Canada) and distance, and can be compared side by side.