Sinclair Secondary School
🇨🇦 Official data · 2025Whitby, Ontario L1R2K5 · Durham DSB
#139 of 766 secondary schools in Ontario
#139 of 766 nationally
About Sinclair Secondary School
Sinclair Secondary School is a public secondary located in Whitby, in the Durham DSB school board or district of Ontario, Canada. It caters for Grades 9-12. In 2025 it enrolled 1,655 students. Publicly funded schools run by public school boards or districts; free to attend.
Its Success Index (Canada) is 73.1 out of 100, placing it in the top 25% of secondary schools in Canada and 139th of 766 ranked secondary schools in Ontario. Its strongest component is community advantage (fewer low-income households) (84th percentile), and its weakest is osslt first-attempt pass rate (69th percentile).
Other published figures: enrolment 1,655; first language not english 25%; special education 19%; identified as gifted 2%.
There are 50 schools in Whitby; Sinclair Secondary School ranks 12th of 41 scored schools there.
Success Index (Canada) breakdown
Each component is a percentile against secondary schools across Canada.
- EQAO Grade 3 (reading, writing, maths) (20%)–
- EQAO Grade 6 (reading, writing, maths) (25%)–
- EQAO Grade 9 mathematics (25%)66%
- OSSLT first-attempt pass rate (20%)90%
- FSA literacy score (25%)–
- FSA numeracy score (25%)–
- Community advantage (fewer low-income households) (10%)5%
- Parent education (fewer parents without a credential) (10%)2%
The Success Index (Canada) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Sinclair Secondary School by the official sources.
- Enrolment
- 1,655
- Students enrolled in the latest published year.
- EQAO Grade 9 maths
- 66%
- % at or above the provincial standard in Grade 9 mathematics.
- OSSLT pass rate
- 90%
- % passing the Grade 10 literacy test on the first attempt.
- Low-income households
- 5%
- % of students living in low-income households.
- Parents without a credential
- 2%
- % of students whose parents have no degree, diploma or certificate.
- First language not English
- 25%
- % of students whose first language is not English.
- Special education
- 19%
- % of students receiving special education services.
- Identified as gifted
- 2%
- % of students identified as gifted.
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Schools near Sinclair Secondary School
Closest schools by straight-line distance, with their Success Index (Canada).
Willows Walk Public School
Whitby · Public elementary · Grades JK-8
540 students · 592 m away
Fallingbrook Public School
Whitby · Public elementary · Grades JK-8
695 students · 703 m away
Father Leo J Austin Catholic Secondary School
Whitby · Catholic secondary · Grades 9-12
1,125 students · 894 m away
St Bernard Catholic School
Whitby · Catholic elementary · Grades JK-8
270 students · 963 m away
Ormiston Public School
Whitby · Public elementary · Grades JK-8
695 students · 1.4 km away
ÉIC Saint-Charles-Garnier
Whitby · Catholic elementary · Grades 7-8
275 students · 1.5 km away
ÉSC Saint-Charles-Garnier
Whitby · Catholic secondary · Grades 9-12
470 students · 1.5 km away
Sir Samuel Steele Public School
Whitby · Public elementary · Grades JK-8
510 students · 1.6 km away
St Mark the Evangelist Catholic School
Whitby · Catholic elementary · Grades JK-8
610 students · 1.6 km away
St Matthew the Evangelist Catholic School
Whitby · Catholic elementary · Grades JK-8
430 students · 1.7 km away
Similar schools
Public secondary schools in Ontario with a comparable Enrolment.
West Niagara Secondary School
Lincoln · Public secondary · Grades 9-12
1,655 students
Garth Webb Secondary School
Oakville · Public secondary · Grades 9-12
1,655 students
Centennial Collegiate and Vocational Institute
Guelph · Public secondary · Grades 9-12
1,655 students
Longfields Davidson Heights Secondary School
Nepean · Public secondary · Grades 9-12
1,650 students
Kitchener Waterloo Collegiate and Vocational School
Kitchener · Public secondary · Grades 9-12
1,650 students
Tommy Douglas Secondary School
Woodbridge · Public secondary · Grades 9-12
1,645 students
Frequently asked questions
Is Sinclair Secondary School a good school?
Sinclair Secondary School has a Success Index (Canada) of 73.1 out of 100 (Top 25% of secondary schools in Canada) and ranks #139 of 766 in Ontario. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Sinclair Secondary School rank in Ontario?
Sinclair Secondary School ranks #139 of 766 secondary schools in Ontario and #139 of 766 nationally on the Success Index (Canada) (2025 data).
How many students attend Sinclair Secondary School?
Sinclair Secondary School had 1,655 students in 2025.
Is Sinclair Secondary School a elementary school or a secondary school?
Sinclair Secondary School is classified as a secondary covering Grades 9-12. It is a public school.
What other schools are near Sinclair Secondary School?
There are 10 schools within 15 km of Sinclair Secondary School; they are listed on this page with their Success Index (Canada) and distance, and can be compared side by side.