Mosman High School
Updated Oct 2026 · ACARA 2025Mosman, New South Wales 2088 · Mosman LGA
About Mosman High School
Mosman High School is a public high school located in Mosman, New South Wales (2088), within the Mosman local government area. It caters for students from 7 to 12 and in 2025 enrolled 1,087 students (514 girls and 573 boys).
Mosman High School has an ICSEA value of 1126, indicating very high socio-educational advantage. That places it in the 91st percentile of Australian schools. 50% of students come from the top socio-educational quarter and 3% from the bottom quarter.
The school employs 66 teachers (75.3 full-time equivalent) and 12 non-teaching staff, giving a student-to-teacher ratio of about 14.4 to 1. Enrolments have remained steady over the past five years.
On the Success Index, Mosman High School scores 72.7 out of 100, placing it in the top 25% of secondary schools nationally and 78th of 539 secondary schools in NSW.
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1126
- Students in the top advantage quarter (15%)50% of students
- Teacher resourcing (students per teacher) (15%)14.4 students per teacher
- Enrolment growth vs local area (5 years) (10%)+2% enrolments since 2020
- 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 Mosman High School's 1,087 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Mosman High School have changed over the past decade.
Free academic assessment
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Schools near Mosman High School
Closest schools by straight-line distance, with their Success Index.
Mosman Public School
Mosman · Government primary · K-6
458 students · ICSEA 1157 · 274 m away
Mosman Church of England Preparatory School
Mosman · Independent primary · K-6
221 students · ICSEA 1206 · 476 m away
Blessed Sacrament Catholic Primary School
Clifton Gardens · Catholic primary · K-6
114 students · ICSEA 1188 · 612 m away
Queenwood
Mosman · Independent combined · K-12
816 students · ICSEA 1172 · 813 m away
Sacred Heart Catholic Primary School
Mosman · Catholic primary · K-6
373 students · ICSEA 1189 · 870 m away
Middle Harbour Public School
Mosman · Government primary · K-6
423 students · ICSEA 1162 · 1.3 km away
SCECGS Redlands
Cremorne · Independent combined · K-12
1,680 students · ICSEA 1190 · 1.5 km away
Beauty Point Public School
Mosman · Government primary · K-6
205 students · ICSEA 1154 · 2.0 km away
Neutral Bay Public School
Neutral Bay · Government primary · K-6
641 students · ICSEA 1169 · 2.2 km away
Northbridge Public School
Northbridge · Government primary · K-6
364 students · ICSEA 1181 · 3.0 km away
Similar schools
Government secondary schools in NSW with a comparable ICSEA.
Newtown High School of Performing Arts
Newtown · Government high school · 7-12
1,145 students · ICSEA 1127
St Ives High School
St Ives · Government high school · 6-12
1,756 students · ICSEA 1125
Castle Hill High School
Castle Hill · Government high school · 7-12
1,845 students · ICSEA 1121
Killarney Heights High School
Killarney Heights · Government high school · 7-12
969 students · ICSEA 1132
Parramatta High School
Parramatta · Government high school · 7-12
1,128 students · ICSEA 1132
Turramurra High School
South Turramurra · Government high school · 7-12
987 students · ICSEA 1118
Frequently asked questions
Is Mosman High School a public or private school?
Mosman High School is a public (government) school run by the New South Wales education department.
What year levels does Mosman High School offer?
Mosman High School offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Mosman High School?
In 2025, Mosman High School had 1,087 enrolled students (514 girls, 573 boys), a change of 2% over five years.
What is the ICSEA of Mosman High School?
Mosman High School has an ICSEA (Index of Community Socio-Educational Advantage) of 1126. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does Mosman High School rank in NSW?
Mosman High School ranks 78th of 539 secondary schools in New South Wales on the Success Index (72.7/100), and 215th of 1,472 nationally.
What is the student-to-teacher ratio at Mosman High School?
Mosman High School has about 14.4 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Mosman High School?
In 2025, Mosman High School had 183 students in Year 7 and 171 in Year 12.
Is Mosman High School co-ed?
Yes. Mosman High School is a co-educational school enrolling both girls and boys.
What other schools are near Mosman High School?
There are 10 other schools within 15 km of Mosman 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 Mosman High School?
The closest Success Tutoring centre is Success Tutoring Chatswood, about 6.9 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.