Stamford competes in two leagues. SEASAC is a 16-school regional conference where students travel across Southeast Asia to compete. ACSIS is the local league, with teams from age 8U through 19U. Both cover Football, Basketball, Tennis, Cross Country, Badminton, Golf, Rugby, Touch Rugby, Volleyball, Swimming, Gymnastics, Softball, and Track.
In 2024, the Lions Boys Volleyball team was promoted to SEASAC Division 1.
Student-athletes also receive support for university sports recruitment, including highlight reels, coach outreach, and scholarship applications.












