Oakhill College
Updated Oct 2026 · ACARA 2025Castle Hill, New South Wales 2154 · Hornsby LGA
About Oakhill College
Oakhill College is an independent high school located in Castle Hill, New South Wales (2154), within the Hornsby local government area. It caters for students from 7 to 12 and in 2025 enrolled 2,242 students (262 girls and 1,980 boys). The school is affiliated with Catholic Schools NSW.
Oakhill College has an ICSEA value of 1124, indicating very high socio-educational advantage. That places it in the 90th percentile of Australian schools. 49% of students come from the top socio-educational quarter and 3% from the bottom quarter.
The school employs 152 teachers (150.2 full-time equivalent) and 50 non-teaching staff, giving a student-to-teacher ratio of about 14.9 to 1. Enrolments have grown by 27% over the past five years.
On the Success Index, Oakhill College scores 77.4 out of 100, placing it in the top 10% of secondary schools nationally and 35th of 539 secondary schools in NSW (5th 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 1124
- Students in the top advantage quarter (15%)49% of students
- Teacher resourcing (students per teacher) (15%)14.9 students per teacher
- Enrolment growth vs local area (5 years) (10%)+27% enrolments since 2020 (area median +1%)
- ICSEA trend (5 years) (10%)+8 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 Oakhill College's 2,242 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Oakhill College have changed over the past decade.
Free academic assessment
Is your child on track at Oakhill 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.
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Schools near Oakhill College
Closest schools by straight-line distance, with their Success Index.
Oakhill Drive Public School
Castle Hill · Government primary · K-6
756 students · ICSEA 1152 · 363 m away
St Bernadette's Primary School
Castle Hill · Catholic primary · K-6
479 students · ICSEA 1145 · 1.2 km away
Castle Hill Public School
Castle Hill · Government primary · K-6
970 students · ICSEA 1128 · 1.5 km away
Cherrybrook Technology High School
Cherrybrook · Government high school · 7-12
2,098 students · ICSEA 1146 · 1.6 km away
John Purchase Public School
Cherrybrook · Government primary · K-6
550 students · ICSEA 1168 · 1.8 km away
Castle Hill High School
Castle Hill · Government high school · 7-12
1,845 students · ICSEA 1121 · 2.0 km away
Tangara School for Girls
Cherrybrook · Independent combined · K-12
771 students · ICSEA 1141 · 2.0 km away
Cherrybrook Public School
Cherrybrook · Government primary · K-6
886 students · ICSEA 1164 · 2.1 km away
Lorien Novalis School for Rudolf Steiner Education
Dural · Independent combined · K-12
238 students · ICSEA 1103 · 2.5 km away
Warrah Specialist School
Dural · Independent special · U
34 students · ICSEA 1065 · 2.8 km away
Similar schools
Independent secondary schools in NSW with a comparable ICSEA.
Rosebank College
Five Dock · Independent high school · 7-12
1,472 students · ICSEA 1125
St Joseph's College
Hunters Hill · Independent high school · 7-12
1,100 students · ICSEA 1130
Stella Maris College
Manly · Independent high school · 7-12
1,006 students · ICSEA 1135
Frensham School
Mittagong · Independent high school · 7-12
345 students · ICSEA 1137
Alpha Omega Senior College
Auburn · Independent high school · 7-12
822 students · ICSEA 1111
St Scholastica's College Glebe Point
Glebe · Independent high school · 7-12
1,044 students · ICSEA 1138
Frequently asked questions
Is Oakhill College a public or private school?
Oakhill College is a Independent school, which makes it a non-government (private) school affiliated with Catholic Schools NSW.
What year levels does Oakhill College offer?
Oakhill College offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Oakhill College?
In 2025, Oakhill College had 2,242 enrolled students (262 girls, 1,980 boys), a change of 27% over five years.
What is the ICSEA of Oakhill College?
Oakhill College has an ICSEA (Index of Community Socio-Educational Advantage) of 1124. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does Oakhill College rank in NSW?
Oakhill College ranks 35th of 539 secondary schools in New South Wales on the Success Index (77.4/100), and 102nd of 1,472 nationally.
What is the student-to-teacher ratio at Oakhill College?
Oakhill College has about 14.9 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Oakhill College?
In 2025, Oakhill College had 356 students in Year 7 and 411 in Year 12.
Is Oakhill College co-ed?
Yes. Oakhill College is a co-educational school enrolling both girls and boys.
What other schools are near Oakhill College?
There are 10 other schools within 15 km of Oakhill 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 Oakhill College?
The closest Success Tutoring centre is Success Tutoring Baulkham Hills, about 5.1 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.