Government co-ed secondary (Years 7–12) in Mosman, NSW; 1087 students in major cities.
NAPLAN averaging +35 above national year-level averages; the result is a B overall.
Mosman High School draws students from the Mosman HS (and 1 more zone).
Mosman High School has an overall SchoolRank score of 62.2/100, rated "Good". This score is calculated from academic results, student growth, wellbeing, extracurricular programs, and value for money. Academically, the school scores 66/100, indicating moderate performance relative to other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1126, well above the national average of 1,000.
In 2025 NAPLAN testing at Mosman High School, Year 7 students averaged 571 across the tested NAPLAN domains, above the national average of 540 for that year level, and Year 9 students averaged 607, above the national average of 569 for that year level. Relative to national year-level averages, the school's strongest domain is Grammar. National averages are specific to each year level, because NAPLAN scores are scaled so older year levels score higher, a school-wide average can't be compared with a single national figure.
Mosman High School is a large government secondary school with approximately 1,087 students. It offers education for years 7-12. As a government school, enrolment is generally available to students living within the school's designated catchment zone. Families outside the zone may apply for out-of-area placement subject to availability.
Mosman High School is a government school, so there are no tuition fees. Families may be asked to contribute to voluntary school fees covering materials, excursions, and activities. The school has a value score of 70/100 on SchoolRank, which compares educational outcomes relative to cost, government schools typically score well on this measure.
Mosman High School has a student-to-teacher ratio of 14.4:1. This is around the national average of approximately 14:1, meaning class sizes are typical for Australian schools. Support staff make up 16% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 91%, which is moderate.
The Year 12 completion rate is 92%.
Mosman High School is located in Mosman, NSW, classified as a major cities school. With an ICSEA of 1126 (91th percentile), the school community's socio-educational advantage is above average, families tend to have higher education and income levels. ICSEA measures the educational advantage of a school's community, not the school's quality, a lower ICSEA school with strong academic scores may indicate particularly effective teaching.