Our Lady of Mercy College vs St John's School
A head-to-head comparison of two schools in Victoria, 97 m apart, using official ACARA 2025 data. Best value in each row is highlighted.
Our Lady of Mercy College
Heidelberg · Catholic high school · 7-12
1,175 students · ICSEA 1111
St John's School
Heidelberg · Catholic primary · Prep-6
345 students · ICSEA 1129
| Measure | Our Lady of Mercy College Heidelberg VIC | St John's School Heidelberg VIC |
|---|---|---|
| Success Index | 77 Top 10% | 76 Top 10% |
| State rank (type) | #50 of 348 | #228 of 1,290 |
| National rank (type) | #118 of 1,472 | #469 of 4,908 |
| Sector | Catholic | Catholic |
| Type | Secondary | Primary |
| Year range | 7-12 | Prep-6 |
| Students | 1,175 | 345 |
| Girls / boys | 1,175 / 0 | 197 / 148 |
| Foundation intake | – | 44 |
| Year 7 cohort | 203 | – |
| Year 12 cohort | 193 | – |
| VCE median study score VCAA, latest year | 33 | – |
| VCE study scores 40+ | 10.3% | – |
| 5-year enrolment growth | -2% | +1% |
| ICSEA Average 1000 | 1111 | 1129 |
| ICSEA percentile | 87th | 91th |
| Top SEA quarter | 42% | 51% |
| Bottom SEA quarter | 5% | 3% |
| Students per teacher | 12.2 | 15.5 |
| Teaching staff (FTE) | 96.4 | 22.2 |
| Non-teaching staff (FTE) | 43.5 | 2.7 |
| Language background other than English | 27% | 21% |
| Indigenous students | 0% | 0% |
| Suburb | Heidelberg 3084 | Heidelberg 3084 |
| Council area | Banyule | Banyule |
| Remoteness | Major Cities | Major Cities |
| Website | www.olmcheidelberg.catholic.edu.au | www.sjheidelberg.catholic.edu.au |
The verdict
- •Both schools have almost identical Success Index scores (76.8 vs 75.9).
- •St John's School has the higher ICSEA (1129 vs 1111), indicating a more advantaged community.
- •Our Lady of Mercy College has fewer students per teacher (12.2 vs 15.5).
- •Our Lady of Mercy College is the larger school with 1,175 students compared with 345.
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 Our Lady of Mercy College better than St John's School?
The two schools are very close on the Success Index. Differences in sector, size, year range and distance from home will matter more than the score.
How far apart are Our Lady of Mercy College and St John's School?
About 97 m in a straight line, between Heidelberg and Heidelberg in Victoria.
Which has the better student-to-teacher ratio?
Our Lady of Mercy College has 12.2 students per full-time-equivalent teacher and St John's School has 15.5.
How do Our Lady of Mercy College and St John's School rank in VIC?
Our Lady of Mercy College is 50th of 348 and St John's School is 228th of 1,290 among secondary schools in Victoria on the 2025 Success Index.