Bayside P-12 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.
Bayside P-12 College
Williamstown · Government combined · Prep-12
958 students · ICSEA 1006
St Mary's School
Williamstown · Catholic primary · Prep-6
263 students · ICSEA 1107
| Measure | Bayside P-12 College Williamstown VIC | St Mary's School Williamstown VIC |
|---|---|---|
| Success Index | 45 Lower 50% | 66 Top 25% |
| State rank (type) | #172 of 239 | #507 of 1,290 |
| National rank (type) | #775 of 1,259 | #1398 of 4,908 |
| Sector | Government | Catholic |
| Type | Combined | Primary |
| Year range | Prep-12 | Prep-6 |
| Students | 958 | 263 |
| Girls / boys | 469 / 489 | 131 / 132 |
| Foundation intake | 9 | 41 |
| Year 7 cohort | 136 | – |
| Year 12 cohort | 110 | – |
| VCE median study score VCAA, latest year | 27 | – |
| VCE study scores 40+ | 1.9% | – |
| 5-year enrolment growth | -9% | -22% |
| ICSEA Average 1000 | 1006 | 1107 |
| ICSEA percentile | 50th | 86th |
| Top SEA quarter | 16% | 40% |
| Bottom SEA quarter | 36% | 3% |
| Students per teacher | 9.9 | 14.5 |
| Teaching staff (FTE) | 96.7 | 18.2 |
| Non-teaching staff (FTE) | 35.8 | 7.2 |
| Language background other than English | 48% | 8% |
| Indigenous students | 2% | 0% |
| Suburb | Williamstown 3016 | Williamstown 3016 |
| Council area | Hobsons Bay | Hobsons Bay |
| Remoteness | Major Cities | Major Cities |
| Website | www.bayside.vic.edu.au | www.smwilliamstown.catholic.edu.au |
The verdict
- •St Mary's School scores higher on the Success Index (65.8 vs 44.5).
- •St Mary's School has the higher ICSEA (1107 vs 1006), indicating a more advantaged community.
- •Bayside P-12 College has fewer students per teacher (9.9 vs 14.5).
- •Bayside P-12 College is the larger school with 958 students compared with 263.
- •Bayside P-12 College has grown faster over five years (-9% vs -22%).
- •Bayside P-12 College is a government school while St Mary's School is a catholic school, so fees and enrolment rules differ.
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 Bayside P-12 College better than St Mary's School?
On the Success Index, St Mary's School ranks higher (65.8 vs 44.5 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 Bayside P-12 College and St Mary's School?
About 1.5 km in a straight line, between Williamstown and Williamstown in Victoria.
Which has the better student-to-teacher ratio?
Bayside P-12 College has 9.9 students per full-time-equivalent teacher and St Mary's School has 14.5.
How do Bayside P-12 College and St Mary's School rank in VIC?
Bayside P-12 College is 172nd of 239 and St Mary's School is 507th of 1,290 among combined schools in Victoria on the 2025 Success Index.