St Leo's Catholic College
Updated Oct 2026 · ACARA 2025Wahroonga, New South Wales 2076 · Hornsby LGA
About St Leo's Catholic College
St Leo's Catholic College is a catholic high school located in Wahroonga, New South Wales (2076), within the Hornsby local government area. It caters for students from 7 to 12 and in 2025 enrolled 1,055 students (455 girls and 600 boys). The school is affiliated with Catholic Schools NSW.
St Leo's Catholic College has an ICSEA value of 1113, indicating very high socio-educational advantage. That places it in the 88th percentile of Australian schools. 44% of students come from the top socio-educational quarter and 4% from the bottom quarter.
The school employs 86 teachers (78.4 full-time equivalent) and 20 non-teaching staff, giving a student-to-teacher ratio of about 13.5 to 1. Enrolments have grown by 40% over the past five years.
On the Success Index, St Leo's Catholic College scores 80.1 out of 100, placing it in the top 5% of secondary schools nationally and 20th of 539 secondary schools in NSW (2nd of 11 in the Hornsby area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1113
- Students in the top advantage quarter (15%)44% of students
- Teacher resourcing (students per teacher) (15%)13.5 students per teacher
- Enrolment growth vs local area (5 years) (10%)+40% enrolments since 2020 (area median +1%)
- ICSEA trend (5 years) (10%)+14 ICSEA points since 2020
The Success Index summarises the academic environment of a school community using official ACARA data. It is not a measure of teaching quality or student results. Read the methodology.
Student profile
Distribution of students across socio-educational advantage (SEA) quarters, plus community characteristics.
Enrolments by year level
How St Leo's Catholic College's 1,055 students are spread across year levels in 2025.
Enrolment trend
How enrolments at St Leo's Catholic College have changed over the past decade.
Free academic assessment
Is your child on track at St Leo's Catholic College?
Rankings tell you about a school community. A free Success Tutoring assessment tells you about your child: exactly where they are in English and Maths, where the gaps are, and a plan to close them. Small-group, Australian-curriculum tutoring with no lock-in contracts.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Your nearest centre: Success Tutoring Hornsby
Schools near St Leo's Catholic College
Closest schools by straight-line distance, with their Success Index.
Our Lady of the Rosary Catholic Primary School
Waitara · Catholic primary · K-6
337 students · ICSEA 1153 · 138 m away
Marri Mittigar School
Hornsby · Independent special · K-8
28 students · ICSEA 984 · 487 m away
Loreto Normanhurst
Normanhurst · Independent combined · 5-12
1,240 students · ICSEA 1164 · 763 m away
Normanhurst Boys High School
Normanhurst · Government high school · 7-12
752 students · ICSEA 1207 · 797 m away
Abbotsleigh
Wahroonga · Independent combined · K-12
1,634 students · ICSEA 1217 · 809 m away
Barker College
Hornsby · Independent combined · K-12
2,856 students · ICSEA 1166 · 835 m away
Clarke Road School
Hornsby · Government special · U
61 students · ICSEA 1063 · 918 m away
Hornsby South Public School
Hornsby · Government primary · K-6
534 students · ICSEA 1110 · 921 m away
Hornsby Girls High School
Hornsby · Government high school · 7-12
722 students · ICSEA 1209 · 990 m away
Waitara Public School
Wahroonga · Government primary · K-6
972 students · ICSEA 1148 · 993 m away
Similar schools
Catholic secondary schools in NSW with a comparable ICSEA.
Brigidine College Randwick
Randwick · Catholic high school · 7-12
851 students · ICSEA 1114
St Clare's College
Waverley · Catholic high school · 7-12
773 students · ICSEA 1118
Marist College Eastwood
Eastwood · Catholic high school · 7-12
976 students · ICSEA 1119
Marist Sisters' College Woolwich
Woolwich · Catholic high school · 7-12
937 students · ICSEA 1101
Marcellin College
Randwick · Catholic high school · 7-12
964 students · ICSEA 1100
St John XXIII Catholic College (Secondary)
Stanhope Gardens · Catholic high school · 7-12
1,166 students · ICSEA 1097
Frequently asked questions
Is St Leo's Catholic College a public or private school?
St Leo's Catholic College is a Catholic school, which makes it a non-government (private) school affiliated with Catholic Schools NSW.
What year levels does St Leo's Catholic College offer?
St Leo's Catholic College offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend St Leo's Catholic College?
In 2025, St Leo's Catholic College had 1,055 enrolled students (455 girls, 600 boys), a change of 40% over five years.
What is the ICSEA of St Leo's Catholic College?
St Leo's Catholic College has an ICSEA (Index of Community Socio-Educational Advantage) of 1113. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does St Leo's Catholic College rank in NSW?
St Leo's Catholic College ranks 20th of 539 secondary schools in New South Wales on the Success Index (80.1/100), and 68th of 1,472 nationally.
What is the student-to-teacher ratio at St Leo's Catholic College?
St Leo's Catholic College has about 13.5 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at St Leo's Catholic College?
In 2025, St Leo's Catholic College had 188 students in Year 7 and 136 in Year 12.
Is St Leo's Catholic College co-ed?
Yes. St Leo's Catholic College is a co-educational school enrolling both girls and boys.
What other schools are near St Leo's Catholic College?
There are 10 other schools within 15 km of St Leo's Catholic College in our database. Scroll up to the "Nearby schools" section to compare them by Success Index, ICSEA and enrolments, or use the Compare tool.
Where can I get tutoring near St Leo's Catholic College?
The closest Success Tutoring centre is Success Tutoring Hornsby, about 1.7 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.