St Augustine Catholic High School vs Unionville High School
A head-to-head comparison of two secondary schools in Ontario, Canada, 2.5 km apart, using official Canadian 2025 data. The better value in each row is highlighted.
St Augustine Catholic High School
Markham · Catholic secondary · Grades 9-12
1,575 students
Unionville High School
Unionville · Public secondary · Grades 9-12
1,865 students
| Measure | St Augustine Catholic High School Markham, Ontario | Unionville High School Unionville, Ontario |
|---|---|---|
| Success Index (Canada) | 82 Top 10% | 68 Top 25% |
| Province rank | #60 of 766 | #193 of 766 |
| National rank | #60 of 766 | #193 of 766 |
| Sector | Catholic | Public |
| Type | Secondary | Secondary |
| Year range | Grades 9-12 | Grades 9-12 |
| Students | 1,575 | 1,865 |
| Enrolment | 1,575 | 1,865 |
| EQAO Grade 3 | – | – |
| EQAO Grade 6 | – | – |
| EQAO Grade 9 maths | 97% | 88% |
| OSSLT pass rate | 96% | 90% |
| Low-income households | 11% | 17% |
| Parents without a credential | 2% | 4% |
| First language not English | 36% | 67% |
| Special education | 12% | 11% |
| Identified as gifted | 0% | 3% |
| 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 | Markham | Unionville |
| province | Ontario | Ontario |
| Website | stau.ycdsb.ca | unionville.hs.yrdsb.ca/ |
The verdict
- •St Augustine Catholic High School scores higher on the Success Index (Canada) (81.8 vs 68.1).
- •St Augustine Catholic High School does better on eqao grade 9 mathematics (97% vs 88%).
- •St Augustine Catholic High School does better on osslt first-attempt pass rate (96% vs 90%).
- •Unionville High School is the larger school with 1,865 students compared with 1,575.
- •St Augustine Catholic High School is a catholic school while Unionville High School is a public 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 St Augustine Catholic High School better than Unionville High School?
On the Success Index (Canada), St Augustine Catholic High School ranks higher (81.8 vs 68.1 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 Augustine Catholic High School and Unionville High School?
About 2.5 km in a straight line, between Markham and Unionville in Ontario.
Which has the better Enrolment?
St Augustine Catholic High School: 1,575. Unionville High School: 1,865. Students enrolled in the latest published year.
How do St Augustine Catholic High School and Unionville High School rank in Ontario?
St Augustine Catholic High School is 60th of 766 and Unionville High School is 193rd of 766 among secondary schools in Ontario on the 2025 Success Index (Canada).