Great Lakes Secondary School vs Holy Trinity Catholic School
A head-to-head comparison of two schools in Ontario, Canada, 2.4 km apart, using official Canadian 2025 data. The better value in each row is highlighted.
Great Lakes Secondary School
Sarnia · Public secondary · Grades 9-12
1,095 students
Holy Trinity Catholic School
Sarnia · Catholic elementary · Grades JK-8
350 students
| Measure | Great Lakes Secondary School Sarnia, Ontario | Holy Trinity Catholic School Sarnia, Ontario |
|---|---|---|
| Success Index (Canada) | 19 Lower 50% | 49 Lower 50% |
| Province rank | #673 of 766 | #2037 of 3,871 |
| National rank | #673 of 766 | #2037 of 3,871 |
| Sector | Public | Catholic |
| Type | Secondary | Elementary |
| Year range | Grades 9-12 | Grades JK-8 |
| Students | 1,095 | 350 |
| Enrolment | 1,095 | 350 |
| EQAO Grade 3 | – | 68% |
| EQAO Grade 6 | – | 72.3% |
| EQAO Grade 9 maths | 31% | – |
| OSSLT pass rate | 72% | – |
| Low-income households | 13% | 10% |
| Parents without a credential | 4% | 0% |
| First language not English | 6% | 5% |
| Special education | 30% | 10% |
| 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 | Sarnia | Sarnia |
| province | Ontario | Ontario |
| Website | glss.lkdsb.net | www.st-clair.net/hts/ |
The verdict
- •Holy Trinity Catholic School scores higher on the Success Index (Canada) (49.2 vs 18.5).
- •Great Lakes Secondary School is the larger school with 1,095 students compared with 350.
- •Great Lakes Secondary School is a public school while Holy Trinity Catholic 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 Great Lakes Secondary School better than Holy Trinity Catholic School?
On the Success Index (Canada), Holy Trinity Catholic School ranks higher (49.2 vs 18.5 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 Great Lakes Secondary School and Holy Trinity Catholic School?
About 2.4 km in a straight line, between Sarnia and Sarnia in Ontario.
Which has the better Enrolment?
Great Lakes Secondary School: 1,095. Holy Trinity Catholic School: 350. Students enrolled in the latest published year.
How do Great Lakes Secondary School and Holy Trinity Catholic School rank in Ontario?
Great Lakes Secondary School is 673rd of 766 and Holy Trinity Catholic School is 2037th of 3,871 among secondary schools in Ontario on the 2025 Success Index (Canada).