Trinity Grammar School (New South Wales)

Trinity Grammar School is a multi-campus independent Anglican single-sex early learning, primary and secondary day school for boys, in inner-western Sydney, New South Wales, Australia. The main campus in Summer Hill provides a comprehensive education to students from Year 7 to Year 12; the campus in Strathfield provides a comprehensive education to early learning and primary school students, from Kindergarten to Year 6; and outdoor education facilities are located at Woollamia on the NSW South Coast. The school previously enrolled boarders until the end of 2019.

Founded in 1913 by George Chambers at Dulwich Hill, the school has a non-selective enrolment policy and currently caters for approximately 2,000 (during 2007)students. The Headmaster of Trinity Grammar School is Timothy Bowden.

Trinity is affiliated with the International Boys' Schools Coalition (IBSC), the Association of Heads of Independent Schools of Australia (AHISA), The Independent Primary School Heads of Australia (IPSHA), which was formerly known as the Junior School Heads Association of Australia (JSHAA), the Independent Primary School Heads of Australia, the Australian Boarding Schools' Association (ABSA), and is a founding member of the Combined Associated Schools (CAS).