All teachers are involved in the co-curricular program at Stratford Hall. The school offers many clubs, beginning in the Primary Years Program and increasing through to the Diploma Program. These clubs offer opportunities for students to participate in activities that interest them, and broaden their experience. Examples of existing clubs are Model United Nations, rock climbing, music (choir, rock band), Mission Kipevu (a school in Africa that the school supports) and debate.

Athletics play an important part at Stratford Hall. Beginning at grade 4, students may participate in a number of school teams including cross country running, soccer, volleyball, basketball, track and field badminton, floor hockey and softball. Stratford Hall is a member of a number of independent school leagues.