Mount St Joseph Girls' College vs St Mary's School
A head-to-head comparison of two schools in Victoria, 1.5 km apart, using official ACARA 2025 data. Best value in each row is highlighted.
Mount St Joseph Girls' College
Altona · Catholic high school · 7-12
1,216 students · ICSEA 1100
St Mary's School
Altona · Catholic primary · Prep-6
259 students · ICSEA 1060
| Measure | Mount St Joseph Girls' College Altona VIC | St Mary's School Altona VIC |
|---|---|---|
| Success Index | 75 Top 25% | 63 Top 50% |
| State rank (type) | #72 of 348 | #588 of 1,290 |
| National rank (type) | #169 of 1,472 | #1662 of 4,908 |
| Sector | Catholic | Catholic |
| Type | Secondary | Primary |
| Year range | 7-12 | Prep-6 |
| Students | 1,216 | 259 |
| Girls / boys | 1,216 / 0 | 138 / 121 |
| Foundation intake | – | 36 |
| Year 7 cohort | 219 | – |
| Year 12 cohort | 184 | – |
| VCE median study score VCAA, latest year | 31 | – |
| VCE study scores 40+ | 3.9% | – |
| 5-year enrolment growth | +15% | -6% |
| ICSEA Average 1000 | 1100 | 1060 |
| ICSEA percentile | 84th | 72th |
| Top SEA quarter | 39% | 21% |
| Bottom SEA quarter | 9% | 13% |
| Students per teacher | 13.6 | 13.1 |
| Teaching staff (FTE) | 89.1 | 19.8 |
| Non-teaching staff (FTE) | 43.5 | 11.3 |
| Language background other than English | 34% | 15% |
| Indigenous students | 0% | 0% |
| Suburb | Altona 3018 | Altona 3018 |
| Council area | Hobsons Bay | Hobsons Bay |
| Remoteness | Major Cities | Major Cities |
| Website | www.msj.vic.edu.au | www.smaltona.catholic.edu.au |
The verdict
- •Mount St Joseph Girls' College scores higher on the Success Index (75.1 vs 62.9).
- •Mount St Joseph Girls' College has the higher ICSEA (1100 vs 1060), indicating a more advantaged community.
- •St Mary's School has fewer students per teacher (13.1 vs 13.6).
- •Mount St Joseph Girls' College is the larger school with 1,216 students compared with 259.
- •Mount St Joseph Girls' College has grown faster over five years (15% vs -6%).
The Success Index summarises community advantage, resourcing and momentum from ACARA data. It does not measure teaching quality, results or fit. Methodology.
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Frequently asked questions
Is Mount St Joseph Girls' College better than St Mary's School?
On the Success Index, Mount St Joseph Girls' College ranks higher (75.1 vs 62.9 out of 100). The index measures community advantage and momentum from ACARA data, not teaching quality, so visit both schools before deciding.
How far apart are Mount St Joseph Girls' College and St Mary's School?
About 1.5 km in a straight line, between Altona and Altona in Victoria.
Which has the better student-to-teacher ratio?
Mount St Joseph Girls' College has 13.6 students per full-time-equivalent teacher and St Mary's School has 13.1.
How do Mount St Joseph Girls' College and St Mary's School rank in VIC?
Mount St Joseph Girls' College is 72nd of 348 and St Mary's School is 588th of 1,290 among secondary schools in Victoria on the 2025 Success Index.