Our Lady of Sion College is a Catholic school for girls located in Box Hill, Melbourne, Australia.

The college educates around 950 girls from Year 7 to Year 12. The current principal is Tina Apostolopoulos.

The school is run by the RC Sisters of Sion, a religious order committed to improving Jewish-Christian relations.

Sport

Sion is a member of Girls Sport Victoria (GSV).

GSV premierships

Sion has won the following GSV premierships.

• Netball – 2019
• Softball – 2015

Notable alumni

• Deborah Lawrie – Australia's first female commercial airline pilot
• Rachael Haynes – Australian Women's Cricket Captain (Ashes 2017) and Women's Big Bash League player (Sydney Thunder)
• Bernadine Van Gramberg – former Pro-Vice Chancellor, Swinburne University of Technology