Independent Anglican boys' school, K–12, 2,296 students, Summer Hill, Sydney.
NAPLAN well above the national average at every tested year level and a median ATAR of 91.8; the result is a B overall.
1 HSC Top Achievers — #129 of 240 New South Wales schools.
Trinity Grammar School has an overall SchoolRank score of 68.6/100, rated "Good". This score is calculated from academic results, student growth, wellbeing, extracurricular programs, and value for money. Academically, the school scores 78/100, indicating strong performance relative to other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1168, well above the national average of 1,000.
In 2025 NAPLAN testing at Trinity Grammar School, Year 3 students averaged 489 across the tested NAPLAN domains, well above the national average of 407 for that year level, and Year 5 students averaged 549, well above the national average of 490 for that year level, and Year 7 students averaged 600, well above the national average of 540 for that year level, and Year 9 students averaged 620, 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.
Trinity Grammar School is a large independent combined school with approximately 2,296 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.
Trinity Grammar School has approximate annual tuition fees of $34,062. Actual fees may vary by year level, and additional costs for uniforms, camps, and extracurricular activities typically apply. The school's value score is 56/100, which measures academic outcomes relative to the cost of attendance.
Trinity Grammar School has a student-to-teacher ratio of 9.0:1. This is well below the national average of approximately 14:1, meaning students generally receive more individual attention. Support staff make up 37% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 94%, which is strong.
Trinity Grammar School has a median ATAR of 91.8. The apparent retention rate from Year 10 to Year 12 is 101%, indicating how many students stay through to graduation.
Trinity Grammar School is located in Summer Hill, NSW, classified as a major cities school. With an ICSEA of 1168 (98th 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.