St Marcellinus Secondary School vs St Robert Catholic High School
A head-to-head comparison of two secondary schools in Ontario, Canada, 35 km apart, using official Canadian 2025 data. The better value in each row is highlighted.
St Marcellinus Secondary School
Mississauga · Catholic secondary · Grades 9-12
1,715 students
St Robert Catholic High School
Thornhill · Catholic secondary · Grades 9-12
1,705 students
| Measure | St Marcellinus Secondary School Mississauga, Ontario | St Robert Catholic High School Thornhill, Ontario |
|---|---|---|
| Success Index (Canada) | 77 Top 25% | 84 Top 10% |
| Province rank | #105 of 766 | #47 of 766 |
| National rank | #105 of 766 | #47 of 766 |
| Sector | Catholic | Catholic |
| Type | Secondary | Secondary |
| Year range | Grades 9-12 | Grades 9-12 |
| Students | 1,715 | 1,705 |
| Enrolment | 1,715 | 1,705 |
| EQAO Grade 3 | – | – |
| EQAO Grade 6 | – | – |
| EQAO Grade 9 maths | 68% | 92% |
| OSSLT pass rate | 91% | 96% |
| Low-income households | 5% | 10% |
| Parents without a credential | 2% | 2% |
| First language not English | 21% | 58% |
| Special education | 17% | 6% |
| Identified as gifted | 1% | 1% |
| FSA literacy score | – | – |
| FSA numeracy score | – | – |
| FSA Grade 4 literacy score | – | – |
| FSA Grade 4 numeracy score | – | – |
| FSA Grade 7 literacy score | – | – |
| FSA Grade 7 numeracy score | – | – |
| city or town | Mississauga | Thornhill |
| province | Ontario | Ontario |
| Website | www.dpcdsb.org/MARCL | stro.ycdsb.ca/ |
The verdict
- •St Robert Catholic High School scores higher on the Success Index (Canada) (83.8 vs 76.6).
- •St Robert Catholic High School does better on eqao grade 9 mathematics (92% vs 68%).
- •St Robert Catholic High School does better on osslt first-attempt pass rate (96% vs 91%).
- •St Marcellinus Secondary School is the larger school with 1,715 students compared with 1,705.
The Success Index (Canada) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is St Marcellinus Secondary School better than St Robert Catholic High School?
On the Success Index (Canada), St Robert Catholic High School ranks higher (83.8 vs 76.6 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are St Marcellinus Secondary School and St Robert Catholic High School?
About 35 km in a straight line, between Mississauga and Thornhill in Ontario.
Which has the better Enrolment?
St Marcellinus Secondary School: 1,715. St Robert Catholic High School: 1,705. Students enrolled in the latest published year.
How do St Marcellinus Secondary School and St Robert Catholic High School rank in Ontario?
St Marcellinus Secondary School is 105th of 766 and St Robert Catholic High School is 47th of 766 among secondary schools in Ontario on the 2025 Success Index (Canada).