Ajax High School vs Archbishop Denis O'Connor Catholic High School
A head-to-head comparison of two secondary schools in Ontario, Canada, 1.6 km apart, using official Canadian 2025 data. The better value in each row is highlighted.
Ajax High School
Ajax · Public secondary · Grades 9-12
1,330 students
Archbishop Denis O'Connor Catholic High School
Ajax · Catholic secondary · Grades 9-12
710 students
| Measure | Ajax High School Ajax, Ontario | Archbishop Denis O'Connor Catholic High School Ajax, Ontario |
|---|---|---|
| Success Index (Canada) | 54 Top 50% | 50 Lower 50% |
| Province rank | #333 of 766 | #393 of 766 |
| National rank | #333 of 766 | #393 of 766 |
| Sector | Public | Catholic |
| Type | Secondary | Secondary |
| Year range | Grades 9-12 | Grades 9-12 |
| Students | 1,330 | 710 |
| Enrolment | 1,330 | 710 |
| EQAO Grade 3 | – | – |
| EQAO Grade 6 | – | – |
| EQAO Grade 9 maths | 48% | 49% |
| OSSLT pass rate | 87% | 85% |
| Low-income households | 5% | 6% |
| Parents without a credential | 2% | 3% |
| First language not English | 25% | 11% |
| Special education | 21% | 24% |
| Identified as gifted | 1% | 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 | Ajax | Ajax |
| province | Ontario | Ontario |
| Website | ajaxhs.ddsb.ca | doc.dcdsb.ca/ |
The verdict
- •Ajax High School scores higher on the Success Index (Canada) (54.1 vs 49.7).
- •Archbishop Denis O'Connor Catholic High School does better on eqao grade 9 mathematics (49% vs 48%).
- •Ajax High School does better on osslt first-attempt pass rate (87% vs 85%).
- •Ajax High School is the larger school with 1,330 students compared with 710.
- •Ajax High School is a public school while Archbishop Denis O'Connor Catholic High 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 Ajax High School better than Archbishop Denis O'Connor Catholic High School?
On the Success Index (Canada), Ajax High School ranks higher (54.1 vs 49.7 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 Ajax High School and Archbishop Denis O'Connor Catholic High School?
About 1.6 km in a straight line, between Ajax and Ajax in Ontario.
Which has the better Enrolment?
Ajax High School: 1,330. Archbishop Denis O'Connor Catholic High School: 710. Students enrolled in the latest published year.
How do Ajax High School and Archbishop Denis O'Connor Catholic High School rank in Ontario?
Ajax High School is 333rd of 766 and Archbishop Denis O'Connor Catholic High School is 393rd of 766 among secondary schools in Ontario on the 2025 Success Index (Canada).