Chapel services are held once each week, and attendance is required. Several times each year, All-School services are also scheduled. Services are designed with the recognition that students represent a wide variety of faiths and are not necessarily Episcopalian or Christian. The School also realizes that adolescence is a time of great religious questioning and doubt. As a church-related school, OES honors equally the Anglican tradition of which it is a part and the need for students to begin their own religious journey.

Students are asked to treat the church, where most services are held, with reverence, and the services with polite attention. They are also asked to join in any choral singing and, when appropriate, to take part as acolytes, readers, musicians, actors, and even preachers. Suggestions are welcome and should be passed on to the chaplain.