The following clubs and activities are available to Marymount Academy students:
- Big Sister-Little Sister: Sisters in Spirit Club
- Choir
- Environmental Club
- Writing Club
- Dungeon and Dragons Club
- Drama Club
- Girl’s Athletic Association (GAA)
- Marymount Catholic Charities Council (MC3)
- Ontario Students Against Impaired Driving (OSAID)
- Peer Tutoring
- Senior Concert Band
- Students’ Administrative Council (SAC)
- Diversity Club
- Jazz Club