Castle Hill High School
Updated Oct 2026 · ACARA 2025Castle Hill, New South Wales 2154 · The Hills LGA
About Castle Hill High School
Castle Hill High School is a public high school located in Castle Hill, New South Wales (2154), within the The Hills local government area. It caters for students from 7 to 12 and in 2025 enrolled 1,845 students (867 girls and 978 boys).
Castle Hill High School has an ICSEA value of 1121, indicating very high socio-educational advantage. That places it in the 89th percentile of Australian schools. 48% of students come from the top socio-educational quarter and 5% from the bottom quarter.
The school employs 133 teachers (124.1 full-time equivalent) and 21 non-teaching staff, giving a student-to-teacher ratio of about 14.8 to 1. Enrolments have fallen by 6% over the past five years.
On the Success Index, Castle Hill High School scores 71.7 out of 100, placing it in the top 25% of secondary schools nationally and 88th of 539 secondary schools in NSW (5th of 9 in the The Hills area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1121
- Students in the top advantage quarter (15%)48% of students
- Teacher resourcing (students per teacher) (15%)14.8 students per teacher
- Enrolment growth vs local area (5 years) (10%)-6% enrolments since 2020 (area median +0%)
- ICSEA trend (5 years) (10%)+9 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 Castle Hill High School's 1,845 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Castle Hill High School have changed over the past decade.
Free academic assessment
Is your child on track at Castle Hill High School?
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 Castle Hill High School
Closest schools by straight-line distance, with their Success Index.
Castle Hill Public School
Castle Hill · Government primary · K-6
970 students · ICSEA 1128 · 494 m away
St Bernadette's Primary School
Castle Hill · Catholic primary · K-6
479 students · ICSEA 1145 · 1.3 km away
Gilroy Catholic College
Castle Hill · Catholic high school · 7-12
1,307 students · ICSEA 1096 · 1.5 km away
Samuel Gilbert Public School
Castle Hill · Government primary · K-6
643 students · ICSEA 1128 · 1.7 km away
Excelsior Public School
Castle Hill · Government primary · K-6
561 students · ICSEA 1150 · 1.8 km away
St Gabriel's School for students with special needs
Castle Hill · Independent special · U
207 students · ICSEA 1069 · 1.9 km away
Oakhill College
Castle Hill · Independent high school · 7-12
2,242 students · ICSEA 1124 · 2.0 km away
Oakhill Drive Public School
Castle Hill · Government primary · K-6
756 students · ICSEA 1152 · 2.2 km away
St Michael's Primary School
Baulkham Hills · Catholic primary · K-6
696 students · ICSEA 1113 · 2.6 km away
St Angela's Primary School
Castle Hill · Catholic primary · K-6
618 students · ICSEA 1126 · 2.7 km away
Similar schools
Government secondary schools in NSW with a comparable ICSEA.
Turramurra High School
South Turramurra · Government high school · 7-12
987 students · ICSEA 1118
The Ponds High School
The Ponds · Government high school · 7-12
2,321 students · ICSEA 1118
St Ives High School
St Ives · Government high school · 6-12
1,756 students · ICSEA 1125
Epping Boys High School
Eastwood · Government high school · 7-12
1,493 students · ICSEA 1117
Mosman High School
Mosman · Government high school · 7-12
1,087 students · ICSEA 1126
Newtown High School of Performing Arts
Newtown · Government high school · 7-12
1,145 students · ICSEA 1127
Frequently asked questions
Is Castle Hill High School a public or private school?
Castle Hill High School is a public (government) school run by the New South Wales education department.
What year levels does Castle Hill High School offer?
Castle Hill High School offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Castle Hill High School?
In 2025, Castle Hill High School had 1,845 enrolled students (867 girls, 978 boys), a change of -6% over five years.
What is the ICSEA of Castle Hill High School?
Castle Hill High School has an ICSEA (Index of Community Socio-Educational Advantage) of 1121. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does Castle Hill High School rank in NSW?
Castle Hill High School ranks 88th of 539 secondary schools in New South Wales on the Success Index (71.7/100), and 243rd of 1,472 nationally.
What is the student-to-teacher ratio at Castle Hill High School?
Castle Hill High School has about 14.8 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Castle Hill High School?
In 2025, Castle Hill High School had 292 students in Year 7 and 305 in Year 12.
Is Castle Hill High School co-ed?
Yes. Castle Hill High School is a co-educational school enrolling both girls and boys.
What other schools are near Castle Hill High School?
There are 10 other schools within 15 km of Castle Hill High School 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 Castle Hill High School?
The closest Success Tutoring centre is Success Tutoring Baulkham Hills, about 3.6 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.