Trinity Grammar is an independent boys school offering both IB and HSC pathways, with a strong pastoral culture and traditional structure.
NAPLAN well above the national average at every tested year level; the result is a B+ overall.
Trinity Grammar is an independent boys school offering both IB and HSC pathways, with a strong pastoral culture and traditional structure. The school is known for experiential learning through its Field Studies Centre, which delivers outdoor education as a core part of student life. Extension, enrichment and support pathways accommodate a range of learners, while additional language and counselling services support wellbeing. Suits families valuing structured environments, outdoor engagement and pastoral care.
Trinity Grammar School is also known as TGS Summer Hill and Trinity Summer Hill.
1 HSC Top Achievers — #129 of 240 New South Wales schools.
Trinity Grammar School has an overall SchoolRank score of 67.5/100, rated "Good". 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 1168 (98th percentile; the national average is 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 an 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 grades B (Average) for value for money, which weighs academic results against 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 excellent.
In the 2025 HSC, 1 student at Trinity Grammar School was an all-round achiever, with results in the top band across 10 or more units. The school had 1 top achiever place across 2025 HSC courses.
Trinity Grammar School is located in Summer Hill, NSW, in a major city. Its ICSEA is 1168 (98th 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.