Large independent co-ed combined school (K–12) in Wahroonga, NSW, serving 3,345 students with boarding facilities.
NAPLAN well above the national average at every tested year level and a median ATAR of 90.0; the result is an A overall.
Median ATAR 90.0 ranks #6 of 16 New South Wales schools. Within New South Wales Independent schools, ranks #6 of 14.
15 HSC Top Achievers — #6 of 240 New South Wales schools (top 3%).
Knox Grammar School has an overall SchoolRank score of 81.8/100, rated "Excellent". This score is calculated from academic results, student growth, wellbeing, extracurricular programs, and value for money. Academically, the school scores 87/100, indicating strong performance relative to other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1187, well above the national average of 1,000.
In 2025 NAPLAN testing at Knox Grammar School, Year 3 students averaged 509 across the tested NAPLAN domains, well above the national average of 407 for that year level, and Year 5 students averaged 584, well above the national average of 490 for that year level, and Year 7 students averaged 621, well above the national average of 540 for that year level, and Year 9 students averaged 645, well above the national average of 569 for that year level. Relative to national year-level averages, the school's strongest domain is Numeracy. 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.
Knox Grammar School is a large independent combined school with approximately 3,345 students. It offers education for years K-12. As a independent school, enrolment typically involves an application process. Contact the school directly for enrolment criteria, waiting lists, and open day information.
Knox Grammar School has approximate annual tuition fees of $36,650. Actual fees may vary by year level, and additional costs for uniforms, camps, and extracurricular activities typically apply. The school's value score is 65/100, which measures academic outcomes relative to the cost of attendance.
Knox Grammar School has a student-to-teacher ratio of 11.5:1. This is below the national average of approximately 14:1, meaning students generally receive more individual attention. Support staff make up 47% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 95%, which is strong.
Knox Grammar School has a median ATAR of 90.0. The apparent retention rate from Year 10 to Year 12 is 385%, indicating how many students stay through to graduation.
Knox Grammar School is located in Wahroonga, NSW, classified as a major cities school. With an ICSEA of 1187 (99th 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.