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 Rebecca Cetrola.
The school is run by the RC Sisters of Sion, a religious order committed to improving Jewish-Christian relations.
Sion is a member of Girls Sport Victoria (GSV).
Sion has won the following GSV premierships.