St Mary's High School
🇨🇦 Official data · 2025Kitchener, Ontario N2C2S2 · Waterloo CDSB
#422 of 766 secondary schools in Ontario
#422 of 766 nationally
About St Mary's High School
St Mary's High School is a catholic secondary located in Kitchener, in the Waterloo CDSB school board or district of Ontario, Canada. It caters for Grades 9-12. In 2025 it enrolled 2,240 students. Publicly funded Catholic (separate) school boards in Ontario; free to attend.
Its Success Index (Canada) is 47.4 out of 100, placing it in the lower 50% of secondary schools in Canada and 422nd of 766 ranked secondary schools in Ontario. Its strongest component is osslt first-attempt pass rate (86th percentile), and its weakest is parent education (fewer parents without a credential) (25th percentile).
Other published figures: enrolment 2,240; first language not english 37%; special education 21%; identified as gifted 0%.
There are 101 schools in Kitchener; St Mary's High School ranks 31st of 74 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%)48%
- OSSLT first-attempt pass rate (20%)94%
- FSA literacy score (25%)–
- FSA numeracy score (25%)–
- Community advantage (fewer low-income households) (10%)11%
- Parent education (fewer parents without a credential) (10%)7%
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 St Mary's High School by the official sources.
- Enrolment
- 2,240
- Students enrolled in the latest published year.
- EQAO Grade 9 maths
- 48%
- % at or above the provincial standard in Grade 9 mathematics.
- OSSLT pass rate
- 94%
- % passing the Grade 10 literacy test on the first attempt.
- Low-income households
- 11%
- % of students living in low-income households.
- Parents without a credential
- 7%
- % of students whose parents have no degree, diploma or certificate.
- First language not English
- 37%
- % of students whose first language is not English.
- Special education
- 21%
- % of students receiving special education services.
- Identified as gifted
- 0%
- % of students identified as gifted.
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Schools near St Mary's High School
Closest schools by straight-line distance, with their Success Index (Canada).
Country Hills Public School
Kitchener · Public elementary · Grades JK-6
390 students · 632 m away
Our Lady of Grace Catholic Elementary School
Kitchener · Catholic elementary · Grades JK-8
355 students · 698 m away
Alpine Public School
Kitchener · Public elementary · Grades JK-6
285 students · 930 m away
Rockway Public School
Kitchener · Public elementary · Grades JK-6
220 students · 1.2 km away
Wilson Avenue Public School
Kitchener · Public elementary · Grades JK-6
515 students · 1.5 km away
ÉÉC Cardinal-Léger
Kitchener · Catholic elementary · Grades JK-6
250 students · 1.7 km away
Blessed Sacrament Catholic Elementary School
Kitchener · Catholic elementary · Grades JK-8
290 students · 1.8 km away
Queen Elizabeth Public School
Kitchener · Public elementary · Grades JK-6
265 students · 1.8 km away
Monsignor Haller Catholic Elementary School
Kitchener · Catholic elementary · Grades JK-8
400 students · 1.9 km away
Glencairn Public School
Kitchener · Public elementary · Grades JK-6
295 students · 2.1 km away
Similar schools
Catholic secondary schools in Ontario with a comparable Enrolment.
Bishop Ryan Catholic Secondary School
Hannon · Catholic secondary · Grades 9-12
2,115 students
Michael Power/St Joseph High School
Toronto · Catholic secondary · Grades 9-12
2,035 students
St Benedict Catholic Secondary School
Cambridge · Catholic secondary · Grades 9-12
1,955 students
Resurrection Catholic Secondary School
Kitchener · Catholic secondary · Grades 9-12
1,920 students
St Francis Xavier Secondary School
Mississauga · Catholic secondary · Grades 9-12
1,890 students
Assumption College School High School
Brantford · Catholic secondary · Grades 9-12
1,865 students
Frequently asked questions
Is St Mary's High School a good school?
St Mary's High School has a Success Index (Canada) of 47.4 out of 100 (Lower 50% of secondary schools in Canada) and ranks #422 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 St Mary's High School rank in Ontario?
St Mary's High School ranks #422 of 766 secondary schools in Ontario and #422 of 766 nationally on the Success Index (Canada) (2025 data).
How many students attend St Mary's High School?
St Mary's High School had 2,240 students in 2025.
Is St Mary's High School a elementary school or a secondary school?
St Mary's High School is classified as a secondary covering Grades 9-12. It is a catholic school.
What other schools are near St Mary's High School?
There are 10 schools within 15 km of St Mary's High School; they are listed on this page with their Success Index (Canada) and distance, and can be compared side by side.