Alpha Omega Senior College vs St Mary Star of the Sea College
A head-to-head comparison of two secondary schools in New South Wales, 65 km apart, using official ACARA 2025 data. Best value in each row is highlighted.
Alpha Omega Senior College
Auburn · Independent high school · 7-12
822 students · ICSEA 1111
St Mary Star of the Sea College
Wollongong · Independent high school · 7-12
1,128 students · ICSEA 1104
| Measure | Alpha Omega Senior College Auburn NSW | St Mary Star of the Sea College Wollongong NSW |
|---|---|---|
| Success Index | 82 Top 5% | 77 Top 10% |
| State rank (type) | #13 of 539 | #37 of 539 |
| National rank (type) | #42 of 1,472 | #106 of 1,472 |
| Sector | Independent | Independent |
| Type | Secondary | Secondary |
| Year range | 7-12 | 7-12 |
| Students | 822 | 1,128 |
| Girls / boys | 401 / 421 | 1,128 / 0 |
| Foundation intake | – | – |
| Year 7 cohort | 113 | 189 |
| Year 12 cohort | 136 | 181 |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | +62% | +3% |
| ICSEA Average 1000 | 1111 | 1104 |
| ICSEA percentile | 87th | 85th |
| Top SEA quarter | 46% | 42% |
| Bottom SEA quarter | 9% | 7% |
| Students per teacher | 13.5 | 12.3 |
| Teaching staff (FTE) | 61.1 | 91.4 |
| Non-teaching staff (FTE) | 29.0 | 34.0 |
| Language background other than English | 99% | 11% |
| Indigenous students | 0% | 3% |
| Suburb | Auburn 2144 | Wollongong 2500 |
| Council area | Cumberland | Wollongong |
| Remoteness | Major Cities | Major Cities |
| Website | www.aosc.nsw.edu.au/ | www.stmarys.nsw.edu.au |
The verdict
- •Alpha Omega Senior College scores higher on the Success Index (82.1 vs 77.3).
- •Alpha Omega Senior College has the higher ICSEA (1111 vs 1104), indicating a more advantaged community.
- •St Mary Star of the Sea College has fewer students per teacher (12.3 vs 13.5).
- •St Mary Star of the Sea College is the larger school with 1,128 students compared with 822.
- •Alpha Omega Senior College has grown faster over five years (62% vs 3%).
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 Alpha Omega Senior College better than St Mary Star of the Sea College?
On the Success Index, Alpha Omega Senior College ranks higher (82.1 vs 77.3 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 Alpha Omega Senior College and St Mary Star of the Sea College?
About 65 km in a straight line, between Auburn and Wollongong in New South Wales.
Which has the better student-to-teacher ratio?
Alpha Omega Senior College has 13.5 students per full-time-equivalent teacher and St Mary Star of the Sea College has 12.3.
How do Alpha Omega Senior College and St Mary Star of the Sea College rank in NSW?
Alpha Omega Senior College is 13th of 539 and St Mary Star of the Sea College is 37th of 539 among secondary schools in New South Wales on the 2025 Success Index.