Trinity Grammar School is an independent Anglican day school for boys with campuses in Summer Hill, Strathfield and Woollamia in inner western Sydney. Founded in 1913 by George Chambers at Dulwich Hill, the school moved to its present Summer Hill site in 1926 and has since developed into a large multi campus institution offering early learning, primary and secondary education. Trinity operates a non selective enrolment policy and educates around 2,000 students across its campuses. It is affiliated with a wide range of national and international school associations and is a founding member of the Combined Associated Schools.
The school offers both the Higher School Certificate and the International Baccalaureate Diploma Programme and is known for its academic, sporting, music and outdoor education programs. Its Summer Hill campus includes specialist facilities for science, design, music, sport and the arts, while the Field Studies Centre at Woollamia supports an extended residential outdoor education programme. Trinity maintains an active alumni community known as the Old Trinitarians, and former students have gone on to careers in public service, business, sport, science, politics and the arts.