The Trinity Community encompasses the many groups that support and actively participate in the life of the School. Collectively, the Trinity Community comprises staff, students, parents, the Society of the Arts, The Parents' and Friends' Association, The Old Trinitarians' Union, The Trinity Connection, Development, The School Foundation, The Clothing Shop, and many Support Groups.

The Trinity Community provides a network of support and assistance to the School. During the course of a School year, the groups within the Trinity Community work towards supporting the academic, sporting, co-curricular and pastoral programmes with the School. Our School Community is a member of NSW Parents' Council. The NSW Parents' Council contains the latest news on key school issues, funding facts, political activity, events, media and helpful web-links. View their site at: www.parentscouncil.nsw.edu.au