Knox Grammar is a traditional, academically focused independent school with structured pathways across Junior, Middle and Senior academies.
NAPLAN well above the national average at every tested year level and a median ATAR of 90.0; the result is an A overall.
Knox Grammar is a traditional, academically focused independent school with structured pathways across Junior, Middle and Senior academies. Strengths include a well-regarded Performing Arts program, Elite Athletes Program, and Cadets training, alongside an Aquatic Centre supporting squad swimming. The school balances intensity with pastoral care through its Science of Wellbeing program, and engages students across STEM via the da Vinci Decathlon and Knox Total Fitness initiative. It suits families seeking a disciplined, comprehensive environment where high achievement in academics, sport and the arts can flourish.
Knox Grammar School is also known as KGS Wahroonga and Knox Wahroonga.
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.
Knox Grammar School has an overall SchoolRank score of 81/100, rated "Excellent". This score is calculated from academic results, student growth, wellbeing, programs, and value for money. Academically, the school grades A (Excellent) against other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1187 (99th percentile; the national average is 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 an 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 grades B+ (Good) for value for money, which weighs academic results against 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 excellent.
Knox Grammar School has a median ATAR of 90.0. The top ATAR was 99.95. In the 2025 HSC, 39 students at Knox Grammar School were all-round achievers, with results in the top band across 10 or more units. The school had 15 top achiever places across 2025 HSC courses.
Knox Grammar School is located in Wahroonga, NSW, in a major city. Its ICSEA is 1187 (99th percentile; the national average is 1,000). ICSEA measures the advantage of a school's community, from its parents' education and occupation, not the school's quality. A school with a lower ICSEA and strong academic results may be teaching particularly effectively.