St Catherine of Siena Catholic School
🇨🇦 Official data · 2025Ajax, Ontario L1T3P1 · Durham CDSB
#531 of 3,871 elementary schools in Ontario
#531 of 3,871 nationally
About St Catherine of Siena Catholic School
St Catherine of Siena Catholic School is a catholic elementary located in Ajax, in the Durham CDSB school board or district of Ontario, Canada. It caters for Grades JK-8. In 2025 it enrolled 350 students. Publicly funded Catholic (separate) school boards in Ontario; free to attend.
Its Success Index (Canada) is 75.7 out of 100, placing it in the top 25% of elementary schools in Canada and 531st of 3,871 ranked elementary schools in Ontario. Its strongest component is eqao grade 6 (reading, writing, maths) (87th percentile), and its weakest is eqao grade 3 (reading, writing, maths) (60th percentile).
Other published figures: enrolment 350; first language not english 10%; special education 15%; identified as gifted 0%.
There are 50 schools in Ajax; St Catherine of Siena Catholic School ranks 2nd of 39 scored schools there.
Success Index (Canada) breakdown
Each component is a percentile against elementary schools across Canada.
- EQAO Grade 3 (reading, writing, maths) (20%)72.7%
- EQAO Grade 6 (reading, writing, maths) (25%)87.7%
- 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%)5%
- Parent education (fewer parents without a credential) (10%)0%
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 Catherine of Siena Catholic School by the official sources.
- Enrolment
- 350
- Students enrolled in the latest published year.
- EQAO Grade 3
- 72.7%
- Average % at or above the provincial standard in reading, writing and mathematics.
- EQAO Grade 6
- 87.7%
- Average % at or above the provincial standard in reading, writing and mathematics.
- Low-income households
- 5%
- % of students living in low-income households.
- Parents without a credential
- 0%
- % of students whose parents have no degree, diploma or certificate.
- First language not English
- 10%
- % of students whose first language is not English.
- Special education
- 15%
- % of students receiving special education services.
- Identified as gifted
- 0%
- % of students identified as gifted.
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Schools near St Catherine of Siena Catholic School
Closest schools by straight-line distance, with their Success Index (Canada).
Dr Roberta Bondar Public School
Ajax · Public elementary · Grades JK-8
220 students · 386 m away
St Teresa of Calcutta Catholic School
Ajax · Catholic elementary · Grades JK-8
270 students · 545 m away
Lester B Pearson Public School
Ajax · Public elementary · Grades JK-8
340 students · 651 m away
Terry Fox Public School
Ajax · Public elementary · Grades JK-8
470 students · 777 m away
St Jude Catholic School
Ajax · Catholic elementary · Grades JK-8
375 students · 799 m away
Applecroft Public School
Ajax · Public elementary · Grades JK-8
340 students · 837 m away
Nottingham Public School
Ajax · Public elementary · Grades JK-8
520 students · 1.1 km away
Vimy Ridge Public School
Ajax · Public elementary · Grades JK-8
630 students · 1.1 km away
St André Bessette Catholic School
Ajax · Catholic elementary · Grades JK-8
325 students · 1.3 km away
Westney Heights Public School
Ajax · Public elementary · Grades JK-8
375 students · 1.3 km away
Similar schools
Catholic elementary schools in Ontario with a comparable Enrolment.
Madonna Della Libera Catholic Elementary School
Brantford · Catholic elementary · Grades JK-8
350 students
St. Mark Catholic School
Prescott · Catholic elementary · Grades JK-8
350 students
École élémentaire catholique Arc-en-ciel
Orléans · Catholic elementary · Grades JK-6
350 students
Canadian Martyrs School
Mississauga · Catholic elementary · Grades JK-8
350 students
St John the Baptist Elementary School
Bolton · Catholic elementary · Grades JK-8
350 students
Holy Trinity Catholic School
Sarnia · Catholic elementary · Grades JK-8
350 students
Frequently asked questions
Is St Catherine of Siena Catholic School a good school?
St Catherine of Siena Catholic School has a Success Index (Canada) of 75.7 out of 100 (Top 25% of elementary schools in Canada) and ranks #531 of 3,871 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 Catherine of Siena Catholic School rank in Ontario?
St Catherine of Siena Catholic School ranks #531 of 3,871 elementary schools in Ontario and #531 of 3,871 nationally on the Success Index (Canada) (2025 data).
How many students attend St Catherine of Siena Catholic School?
St Catherine of Siena Catholic School had 350 students in 2025.
Is St Catherine of Siena Catholic School a elementary school or a secondary school?
St Catherine of Siena Catholic School is classified as a elementary covering Grades JK-8. It is a catholic school.
What other schools are near St Catherine of Siena Catholic School?
There are 10 schools within 15 km of St Catherine of Siena Catholic School; they are listed on this page with their Success Index (Canada) and distance, and can be compared side by side.