DURHAM REGION / SCHOOL GUIDES
Top 10 catholic secondary schools (high schools) in Durham Region
Compare the highest Fraser academic scores among 10 rated catholic secondary schools physically located in Durham Region. Explore each school’s official information and local new-home projects.
The Fraser Institute score measures selected academic indicators. It is one starting point for research, not a complete assessment of teaching, student support, wellbeing or school fit.
Equal scores share a regional position. To display ten profiles, ties are ordered alphabetically by the current common school name, ignoring the French École prefix. A tied school outside the ten-profile selection is named on the relevant list; it is not academically lower-ranked.
List coverage. Includes English- and French-language schools. This list covers all ten rated Catholic secondary schools in Durham Region.
How we compiled this list- Display position 01
Whitby · English
All Saints Catholic Secondary School
Durham Catholic District School Board
Grades 9–12; Grades 7–8 through the Regional Arts & Media Program
- Display position 02
- Display position 03
Pickering · English
St. Mary Catholic Secondary School
Durham Catholic District School Board
Grades 9–12
- Display position 04
Whitby · French first language
École secondaire catholique Saint-Charles-Garnier
Conseil scolaire catholique MonAvenir
Grades 7–12
- Display position 05
Whitby · English
Father Leo J. Austin Catholic Secondary School
Durham Catholic District School Board
Grades 9–12
- Display position 06
Bowmanville · Clarington · English; French Immersion options
St. Stephen Catholic Secondary School
Peterborough Victoria Northumberland and Clarington Catholic District School Board
Grades 9–12
- Display position 07
Ajax · English
Archbishop Denis O’Connor Catholic High School
Durham Catholic District School Board
Grades 9–12
- Display position 08
Oshawa · English
Monsignor John Pereyma Catholic Secondary School
Durham Catholic District School Board
Grades 7–12
- Display position 09
Oshawa · English
Monsignor Paul Dwyer Catholic High School
Durham Catholic District School Board
Grades 9–12
- Display position 10
Courtice · Clarington · English; French Immersion options
Holy Trinity Catholic Secondary School
Peterborough Victoria Northumberland and Clarington Catholic District School Board
Grades 9–12
BEFORE YOUR NEXT MOVE
Your questions,
answered.
How were these catholic secondary schools selected?
This list follows scores in the 2025 Fraser Institute report for the 2023/2024 school year. We checked 200 rated schools located in Durham Region: 122 public elementary, 23 public secondary, 45 Catholic elementary and 10 Catholic secondary. Coverage includes English- and French-language schools across Durham’s municipalities, including Clarington. Public and Catholic schools are compared separately. Unrated schools are not treated as lower-rated schools. Equal scores share a regional position. To display ten profiles, ties are ordered alphabetically by the current common school name, ignoring the French École prefix. A tied school outside the ten-profile selection is named on the relevant list; it is not academically lower-ranked.
Does a higher score guarantee the best school for my child?
The Fraser Institute score measures selected academic indicators. It is one starting point for research, not a complete assessment of teaching, student support, wellbeing or school fit. Consider programs, learning support, travel arrangements and your child’s needs alongside the academic results.
Are the linked new home developments inside these school boundaries?
The developments on each school guide are grouped by municipality. They are not represented as inside the school’s attendance boundary or as eligible for admission. Confirm the exact home address and registration requirements with the school board.
UNDERSTAND THE COMPARISON
A useful starting point. A broader decision.
These lists order schools by their overall Fraser Institute score in the 2025 Ontario reports, using 2023/2024 results. The elementary report was published in January 2026 and the secondary report in November 2025. They are historical academic results, not 2026 test scores.
The Fraser Institute score measures selected academic indicators. It is one starting point for research, not a complete assessment of teaching, student support, wellbeing or school fit.
Coverage. We checked 200 rated schools located in Durham Region: 122 public elementary, 23 public secondary, 45 Catholic elementary and 10 Catholic secondary. Coverage includes English- and French-language schools across Durham’s municipalities, including Clarington. Public and Catholic schools are compared separately. Unrated schools are not treated as lower-rated schools.
Ties. Equal scores share a regional position. To display ten profiles, ties are ordered alphabetically by the current common school name, ignoring the French École prefix. A tied school outside the ten-profile selection is named on the relevant list; it is not academically lower-ranked.
Methodology source checked October 3, 2026.
Use the board’s current boundary and registration information, visit the school and discuss your child’s needs before making a school or home decision.