Northholm Grammar School
Updated Oct 2026 · ACARA 2025Arcadia, New South Wales 2159 · Hornsby LGA
#37 of 314 combined schools in NSW
#86 of 1,259 nationally
About Northholm Grammar School
Northholm Grammar School is an independent combined (K–12) school located in Arcadia, New South Wales (2159), within the Hornsby local government area. It caters for students from K to 12 and in 2025 enrolled 698 students (303 girls and 395 boys). The school is affiliated with Independent Schools NSW.
Northholm Grammar School has an ICSEA value of 1137, indicating very high socio-educational advantage. That places it in the 93rd percentile of Australian schools. 56% of students come from the top socio-educational quarter and 3% from the bottom quarter.
The school employs 62 teachers (59.4 full-time equivalent) and 32 non-teaching staff, giving a student-to-teacher ratio of about 11.8 to 1. Enrolments have grown by 73% over the past five years.
On the Success Index, Northholm Grammar School scores 81.2 out of 100, placing it in the top 10% of combined schools nationally and 37th of 314 combined schools in NSW (2nd of 7 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 1137
- Students in the top advantage quarter (15%)56% of students
- Teacher resourcing (students per teacher) (15%)11.8 students per teacher
- Enrolment growth vs local area (5 years) (10%)+73% enrolments since 2020 (area median +13%)
- ICSEA trend (5 years) (10%)+28 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 Northholm Grammar School's 698 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Northholm Grammar School have changed over the past decade.
Free academic assessment
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Schools near Northholm Grammar School
Closest schools by straight-line distance, with their Success Index.
Arcadia Public School
Arcadia · Government primary · K-6
60 students · ICSEA 1065 · 2.1 km away
Glenorie Public School
Glenorie · Government primary · K-6
283 students · ICSEA 1055 · 4.3 km away
Galston Public School
Galston · Government primary · K-6
147 students · ICSEA 1042 · 4.9 km away
Middle Dural Public School
Middle Dural · Government primary · K-6
31 students · ICSEA 1007 · 5.3 km away
Galston High School
Galston · Government high school · 7-12
570 students · ICSEA 1044 · 6.4 km away
Hillside Public School
Glenorie · Government primary · K-6
25 students · ICSEA 1041 · 7.2 km away
Wideview Public School
Berowra Heights · Government primary · K-6
321 students · ICSEA 1102 · 8.1 km away
Kenthurst Public School
Kenthurst · Government primary · K-6
187 students · ICSEA 1040 · 8.2 km away
Hornsby Heights Public School
Hornsby · Government primary · K-6
420 students · ICSEA 1104 · 8.3 km away
St Bernard's Catholic Primary School
Berowra Heights · Catholic primary · K-6
297 students · ICSEA 1131 · 8.4 km away
Similar schools
Independent combined schools in NSW with a comparable ICSEA.
Rouse Hill Anglican College
Rouse Hill · Independent combined · K-12
1,578 students · ICSEA 1137
Oxford Falls Grammar School
Oxford Falls · Independent combined · K-12
1,201 students · ICSEA 1137
St Philip's Christian College - Waratah
Waratah · Independent combined · K-12
1,466 students · ICSEA 1138
Santa Sabina College
Strathfield · Independent combined · K-12
1,320 students · ICSEA 1139
Blue Mountains Grammar School
Wentworth Falls · Independent combined · K-12
512 students · ICSEA 1140
Hunter Valley Grammar School
Ashtonfield · Independent combined · K-12
1,161 students · ICSEA 1134
Frequently asked questions
Is Northholm Grammar School a public or private school?
Northholm Grammar School is a Independent school, which makes it a non-government (private) school affiliated with Independent Schools NSW.
What year levels does Northholm Grammar School offer?
Northholm Grammar School offers K to 12. It is classified by ACARA as a combined school.
How many students attend Northholm Grammar School?
In 2025, Northholm Grammar School had 698 enrolled students (303 girls, 395 boys), a change of 73% over five years.
What is the ICSEA of Northholm Grammar School?
Northholm Grammar School has an ICSEA (Index of Community Socio-Educational Advantage) of 1137. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does Northholm Grammar School rank in NSW?
Northholm Grammar School ranks 37th of 314 combined schools in New South Wales on the Success Index (81.2/100), and 86th of 1,259 nationally.
What is the student-to-teacher ratio at Northholm Grammar School?
Northholm Grammar School has about 11.8 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Northholm Grammar School?
In 2025, Northholm Grammar School had 126 students in Year 7 and 49 in Year 12.
Is Northholm Grammar School co-ed?
Yes. Northholm Grammar School is a co-educational school enrolling both girls and boys.
What other schools are near Northholm Grammar School?
There are 10 other schools within 15 km of Northholm Grammar 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 Northholm Grammar School?
The closest Success Tutoring centre is Success Tutoring Hornsby, about 11 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.