In addition to the music, dance, drama and Duke of Edinburgh groups, students can join a wide range of clubs and societies. There is an annual Market Day where students can find out about the clubs and sign up.

These include: 

Debating

Debating is very popular. Teams enter two Interschool competitions. Interclass and interhouse debates are held as well.

HOPE (Help Our Planet Earth)

HOPE is an organisation of students within the school, which concentrates on looking after the planet. Its emphasis is on such global and local issues as re-cycling, endangered species, economic use of resources and raising awareness of these and other related issues amongst the students.

International Students

The International Student Group arranges a number of activities including the organisation of the annual Harmony Day, a Multicultural Food Fair and a Multicultural Assembly. There are also opportunities for St Mary's international students to meet with international students from other Perth schools.

Mock Trials

Mock Trials is an interschool competition enabling interested students to experience conducting trials in a law court setting.

Surfing

Girls from St Mary's participate in a number of surfing competitions throughout the year, and there is usually at least one surf camp. Surfing is organised for some mornings before school.

Tennis

Private or group lessons are available.

Tournament of Minds

Tournament of Minds is an interschool competition involving dramatic performance to solve a specified problem, students being encouraged to think creatively to reach a solution. Girls participate in teams of seven, made up of students from Years 8-10. The competition is in Term III, with meetings held weekly in Terms I and II to practise and prepare.

Vision Generation

This group of students works to raise awareness of the plight of children in other countries. They hold regular meetings, join in with a statewide group of school students, address the school through assemblies and often arrange functions to raise money for the students they are financing through World Vision.

Other Clubs and Societies

  • Animal Rights Club

  • Badminton Club

  • Chess Club

  • Computer Club 4 Girls (CC4G)

  • Creative Writing Club

  • Future Problem Solving

  • Interschool Equestrian Championships

  • Junior Philosophy

  • Library Book Club

  • Oaktree

  • Philosophy Club

  • Robotics Club

  • SCRAM

  • Technology Committee