Galston High School
Updated Oct 2026 · ACARA 2025Galston, New South Wales 2159 · Hornsby LGA
About Galston High School
Galston High School is a public high school located in Galston, New South Wales (2159), within the Hornsby local government area. It caters for students from 7 to 12 and in 2025 enrolled 570 students (282 girls and 288 boys).
Galston High School has an ICSEA value of 1044, indicating a socio-educational profile close to the national average of 1000. That places it in the 66th percentile of Australian schools. 19% of students come from the top socio-educational quarter and 20% from the bottom quarter.
The school employs 51 teachers (52.0 full-time equivalent) and 18 non-teaching staff, giving a student-to-teacher ratio of about 11.0 to 1. Enrolments have fallen by 7% over the past five years.
On the Success Index, Galston High School scores 63.3 out of 100, placing it in the top 50% of secondary schools nationally and 170th of 539 secondary schools in NSW (10th 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 1044
- Students in the top advantage quarter (15%)19% of students
- Teacher resourcing (students per teacher) (15%)11.0 students per teacher
- Enrolment growth vs local area (5 years) (10%)-7% enrolments since 2020 (area median +1%)
- ICSEA trend (5 years) (10%)+2 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 Galston High School's 570 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Galston High School have changed over the past decade.
Free academic assessment
Is your child on track at Galston High School?
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Schools near Galston High School
Closest schools by straight-line distance, with their Success Index.
Galston Public School
Galston · Government primary · K-6
147 students · ICSEA 1042 · 1.5 km away
Middle Dural Public School
Middle Dural · Government primary · K-6
31 students · ICSEA 1007 · 2.5 km away
Dural Public School
Dural · Government primary · K-6
350 students · ICSEA 1102 · 3.2 km away
Redfield College
Dural · Independent combined · 2-12
530 students · ICSEA 1140 · 3.4 km away
Kenthurst Public School
Kenthurst · Government primary · K-6
187 students · ICSEA 1040 · 3.6 km away
The Hills Grammar School
Kenthurst · Independent combined · K-12
1,208 students · ICSEA 1164 · 3.9 km away
New Hope Christian School
Dural · Independent special · U
49 students · ICSEA 1071 · 3.9 km away
Pacific Hills Christian School
Dural · Independent combined · K-12
1,475 students · ICSEA 1118 · 4.0 km away
Arcadia Public School
Arcadia · Government primary · K-6
60 students · ICSEA 1065 · 4.2 km away
St Madeleine's Primary School
Kenthurst · Catholic primary · K-6
388 students · ICSEA 1064 · 4.4 km away
Similar schools
Government secondary schools in NSW with a comparable ICSEA.
Terrigal High School
Terrigal · Government high school · 7-12
847 students · ICSEA 1044
Blakehurst High School
Blakehurst · Government high school · 7-12
1,013 students · ICSEA 1043
Hornsby High School
Asquith · Government high school · 7-12
542 students · ICSEA 1045
Homebush Boys High School
Homebush · Government high school · 7-12
891 students · ICSEA 1043
Kincumber High School
Kincumber · Government high school · 7-12
1,002 students · ICSEA 1045
Menai High School
Menai · Government high school · 7-12
1,062 students · ICSEA 1046
Frequently asked questions
Is Galston High School a public or private school?
Galston High School is a public (government) school run by the New South Wales education department.
What year levels does Galston High School offer?
Galston High School offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Galston High School?
In 2025, Galston High School had 570 enrolled students (282 girls, 288 boys), a change of -7% over five years.
What is the ICSEA of Galston High School?
Galston High School has an ICSEA (Index of Community Socio-Educational Advantage) of 1044. The national average is 1000, so this indicates a socio-educational profile close to the national average of 1000. ICSEA reflects the school community, not teaching quality.
How does Galston High School rank in NSW?
Galston High School ranks 170th of 539 secondary schools in New South Wales on the Success Index (63.3/100), and 435th of 1,472 nationally.
What is the student-to-teacher ratio at Galston High School?
Galston High School has about 11.0 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Galston High School?
In 2025, Galston High School had 113 students in Year 7 and 76 in Year 12.
Is Galston High School co-ed?
Yes. Galston High School is a co-educational school enrolling both girls and boys.
What other schools are near Galston High School?
There are 10 other schools within 15 km of Galston 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 Galston High School?
The closest Success Tutoring centre is Success Tutoring Hornsby, about 6.8 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.