Holy Trinity Catholic Primary School vs Sunbury Downs Secondary College
A head-to-head comparison of two schools in Victoria, 82 m apart, using official ACARA 2025 data. Best value in each row is highlighted.
Holy Trinity Catholic Primary School
Sunbury · Catholic primary · Prep-6
431 students · ICSEA 1065
Sunbury Downs Secondary College
Sunbury · Government high school · 7-12
789 students · ICSEA 1005
| Measure | Holy Trinity Catholic Primary School Sunbury VIC | Sunbury Downs Secondary College Sunbury VIC |
|---|---|---|
| Success Index | 72 Top 25% | 54 Top 50% |
| State rank (type) | #348 of 1,290 | #193 of 348 |
| National rank (type) | #808 of 4,908 | #656 of 1,472 |
| Sector | Catholic | Government |
| Type | Primary | Secondary |
| Year range | Prep-6 | 7-12 |
| Students | 431 | 789 |
| Girls / boys | 214 / 217 | 372 / 417 |
| Foundation intake | 76 | – |
| Year 7 cohort | – | 178 |
| Year 12 cohort | – | 77 |
| VCE median study score VCAA, latest year | – | 27 |
| VCE study scores 40+ | – | 1.9% |
| 5-year enrolment growth | +215% | +20% |
| ICSEA Average 1000 | 1065 | 1005 |
| ICSEA percentile | 74th | 49th |
| Top SEA quarter | 24% | 12% |
| Bottom SEA quarter | 13% | 33% |
| Students per teacher | 14.6 | 12.6 |
| Teaching staff (FTE) | 29.5 | 62.5 |
| Non-teaching staff (FTE) | 11.9 | 29.9 |
| Language background other than English | 17% | 22% |
| Indigenous students | 2% | 3% |
| Suburb | Sunbury 3429 | Sunbury 3429 |
| Council area | Hume | Hume |
| Remoteness | Major Cities | Major Cities |
| Website | htsunbury.catholic.edu.au/ | www.sunburydowns.vic.edu.au |
The verdict
- •Holy Trinity Catholic Primary School scores higher on the Success Index (72.2 vs 54.0).
- •Holy Trinity Catholic Primary School has the higher ICSEA (1065 vs 1005), indicating a more advantaged community.
- •Sunbury Downs Secondary College has fewer students per teacher (12.6 vs 14.6).
- •Sunbury Downs Secondary College is the larger school with 789 students compared with 431.
- •Holy Trinity Catholic Primary School has grown faster over five years (215% vs 20%).
- •Holy Trinity Catholic Primary School is a catholic school while Sunbury Downs Secondary College is a government 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 Holy Trinity Catholic Primary School better than Sunbury Downs Secondary College?
On the Success Index, Holy Trinity Catholic Primary School ranks higher (72.2 vs 54.0 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 Holy Trinity Catholic Primary School and Sunbury Downs Secondary College?
About 82 m in a straight line, between Sunbury and Sunbury in Victoria.
Which has the better student-to-teacher ratio?
Holy Trinity Catholic Primary School has 14.6 students per full-time-equivalent teacher and Sunbury Downs Secondary College has 12.6.
How do Holy Trinity Catholic Primary School and Sunbury Downs Secondary College rank in VIC?
Holy Trinity Catholic Primary School is 348th of 1,290 and Sunbury Downs Secondary College is 193rd of 348 among primary schools in Victoria on the 2025 Success Index.