St. Stephen's and St. Agnes School is proud to belong to two regionally competitive athletic conferences. The boys compete in the Interstate Athletic Conference (I.A.C) and the girls in the Independent School League (I.S.L.). Both leagues are strong and balanced, and offer us the opportunity to compete against other schools that are similar in size as well as in athletic and academic philosophy. The following is a list of the participating schools in each league. For opponents directions, click here.

I.S.L
St. Stephen's and St. Agnes
Bullis
Connelly School of the Holy Child
Episcopal
Foxcroft
Georgetown Day
Georgetown Visitation
Holton-Arms
Madeira
Maret
Model School for the Deaf
National Cathedral
Potomac
Sidwell Friends
Stone Ridge
St. Andrew's

I.A.C.
St. Stephen's and St. Agnes
Episcopal
St. Albans
Georgetown Prep
Landon
Bullis

Sports fielded at the Upper School level include: baseball, basketball, cross country, field hockey, football, lacrosse, soccer, softball, swimming, tennis, track and field, volleyball and wrestling.