CatholicSecondaryYears 7-12· Major Cities

Our Lady of Sion College

Box Hill, VIC 3128 · Victorian Catholic Education Authority

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ICSEA

1111

87th percentile nationally

Elite (top decile)

Total enrolments

930

Secondary

Student–teacher ratio

12:1

80.2 FTE teachers

Gender mix

100% / 0%

girls / boys

Language background

8%

non-English at home

Socio-educational advantage

Share of students in each national SEA quarter (bottom = most disadvantaged, top = most advantaged).

Bottom: 4%
Lower-mid: 17%
Upper-mid: 38%
Top: 42%

Source: ACARA My School 2025. ICSEA reflects the socio-educational background of a school's students — not academic results or teaching quality. National average = 1000. See data sources.