Best secondary schools in Lambton Kent DSB (2025)
Secondary (high) schools and combined schools. Ranked by the Success Index (Canada) from official Canadian data; 12 schools in Lambton Kent DSB, Ontario. Rank positions shown on each profile are within Canada and Ontario.
- 174Northern Collegiate Institute and Vocational SchoolSarnia · Public Secondary92% OSSLT pass rate · 1,145 students
- 265Lambton Central Collegiate and Vocational InstitutePetrolia · Public Secondary90% OSSLT pass rate · 845 students
- 342North Lambton Secondary SchoolForest · Public Secondary83% OSSLT pass rate · 575 students
- 438Blenheim District High SchoolBlenheim · Public Secondary81% OSSLT pass rate · 240 students
- 534Alexander Mackenzie Secondary SchoolSarnia · Public Secondary28% OSSLT pass rate · 300 students
- 629Chatham-Kent Secondary SchoolChatham · Public Secondary77% OSSLT pass rate · 1,150 students
- 727Wallaceburg District Secondary SchoolWallaceburg · Public Secondary75% OSSLT pass rate · 575 students
- 826Lambton Kent Composite SchoolDresden · Public Secondary78% OSSLT pass rate · 350 students
- 919Great Lakes Secondary SchoolSarnia · Public Secondary72% OSSLT pass rate · 1,095 students
- 1014Ridgetown District High SchoolRidgetown · Public Secondary64% OSSLT pass rate · 120 students
- 1112John McGregor Secondary SchoolChatham · Public Secondary65% OSSLT pass rate · 560 students
- 1211Tilbury District High SchoolTilbury · Public Secondary54% OSSLT pass rate · 345 students
| # | School | Sector | Success Index (Canada) | Key result | Students |
|---|---|---|---|---|---|
| 1 | Northern Collegiate Institute and Vocational School Sarnia · Secondary · Grades 9-12 | Public | 74.4 Top 25% | 92% OSSLT pass rate | 1,145 |
| 2 | Lambton Central Collegiate and Vocational Institute Petrolia · Secondary · Grades 9-12 | Public | 65.4 Top 50% | 90% OSSLT pass rate | 845 |
| 3 | North Lambton Secondary School Forest · Secondary · Grades 9-12 | Public | 42.0 Lower 50% | 83% OSSLT pass rate | 575 |
| 4 | Blenheim District High School Blenheim · Secondary · Grades 9-12 | Public | 37.5 Lower 50% | 81% OSSLT pass rate | 240 |
| 5 | Alexander Mackenzie Secondary School Sarnia · Secondary · Grades 9-12 | Public | 33.8 Lower 50% | 28% OSSLT pass rate | 300 |
| 6 | Chatham-Kent Secondary School Chatham · Secondary · Grades 9-12 | Public | 29.3 Lower 50% | 77% OSSLT pass rate | 1,150 |
| 7 | Wallaceburg District Secondary School Wallaceburg · Secondary · Grades 9-12 | Public | 27.4 Lower 50% | 75% OSSLT pass rate | 575 |
| 8 | Lambton Kent Composite School Dresden · Secondary · Grades 9-12 | Public | 26.3 Lower 50% | 78% OSSLT pass rate | 350 |
| 9 | Great Lakes Secondary School Sarnia · Secondary · Grades 9-12 | Public | 18.5 Lower 50% | 72% OSSLT pass rate | 1,095 |
| 10 | Ridgetown District High School Ridgetown · Secondary · Grades 9-12 | Public | 13.5 Lower 50% | 64% OSSLT pass rate | 120 |
| 11 | John McGregor Secondary School Chatham · Secondary · Grades 9-12 | Public | 11.9 Lower 50% | 65% OSSLT pass rate | 560 |
| 12 | Tilbury District High School Tilbury · Secondary · Grades 9-12 | Public | 10.5 Lower 50% | 54% OSSLT pass rate | 345 |
Northern Collegiate Institute and Vocational School in Sarnia leads the 2025 list of secondary schools in Lambton Kent DSB with a Success Index (Canada) of 74.4. Of the 12 schools shown, 12 are public.
For the full picture see the wider Ontario secondary schools rankings, every school on the Lambton Kent DSB page, or the comparison tool to put a shortlist side by side.
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Frequently asked questions
What is the best secondary school in Lambton Kent DSB?
Northern Collegiate Institute and Vocational School in Sarnia, Ontario ranks first among secondary schools in Lambton Kent DSB with a Success Index (Canada) of 74.4 out of 100 (Enrolment: 1,145).
How are secondary schools in Lambton Kent DSB ranked?
Each school's Success Index (Canada) combines 8 factors: eqao grade 3 (reading, writing, maths) (20%), eqao grade 6 (reading, writing, maths) (25%), eqao grade 9 mathematics (25%), osslt first-attempt pass rate (20%), fsa literacy score (25%), fsa numeracy score (25%), community advantage (fewer low-income households) (10%), parent education (fewer parents without a credential) (10%). Each factor is a percentile against schools of the same type across Canada. Schools with fewer than 60 students are excluded from rankings.
Are these 2025 rankings official?
No. They are computed by Success Tutoring from official Canadian data (Ontario – School information and student demographics; BC Data Catalogue – Foundation Skills Assessment). Provinces publish different assessments, so scores are comparable within a province, not between provinces.