Clarkson Secondary School vs Iona Secondary School
A head-to-head comparison of two secondary schools in Ontario, Canada, 1.8 km apart, using official Canadian 2025 data. The better value in each row is highlighted.
Clarkson Secondary School
Mississauga · Public secondary · Grades 9-12
740 students
Iona Secondary School
Mississauga · Catholic secondary · Grades 9-12
655 students
| Measure | Clarkson Secondary School Mississauga, Ontario | Iona Secondary School Mississauga, Ontario |
|---|---|---|
| Success Index (Canada) | 45 Lower 50% | 50 Lower 50% |
| Province rank | #439 of 766 | #391 of 766 |
| National rank | #439 of 766 | #391 of 766 |
| Sector | Public | Catholic |
| Type | Secondary | Secondary |
| Year range | Grades 9-12 | Grades 9-12 |
| Students | 740 | 655 |
| Enrolment | 740 | 655 |
| EQAO Grade 3 | – | – |
| EQAO Grade 6 | – | – |
| EQAO Grade 9 maths | 49% | 57% |
| OSSLT pass rate | 84% | 83% |
| Low-income households | 8% | 9% |
| Parents without a credential | 4% | 4% |
| First language not English | 33% | 27% |
| Special education | 15% | 24% |
| Identified as gifted | 0% | 0% |
| 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 | Mississauga |
| province | Ontario | Ontario |
| Website | schools.peelschools.org/sec/clarkson/Pages/default.aspx | www.dpcdsb.org/IONAS |
The verdict
- •Iona Secondary School scores higher on the Success Index (Canada) (49.8 vs 44.7).
- •Iona Secondary School does better on eqao grade 9 mathematics (57% vs 49%).
- •Clarkson Secondary School does better on osslt first-attempt pass rate (84% vs 83%).
- •Clarkson Secondary School is the larger school with 740 students compared with 655.
- •Clarkson Secondary School is a public school while Iona Secondary School is a catholic school, so fees and admission rules differ.
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 Clarkson Secondary School better than Iona Secondary School?
On the Success Index (Canada), Iona Secondary School ranks higher (49.8 vs 44.7 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 Clarkson Secondary School and Iona Secondary School?
About 1.8 km in a straight line, between Mississauga and Mississauga in Ontario.
Which has the better Enrolment?
Clarkson Secondary School: 740. Iona Secondary School: 655. Students enrolled in the latest published year.
How do Clarkson Secondary School and Iona Secondary School rank in Ontario?
Clarkson Secondary School is 439th of 766 and Iona Secondary School is 391st of 766 among secondary schools in Ontario on the 2025 Success Index (Canada).