Ashfield Boys High School vs Trinity Grammar School
A head-to-head comparison of two schools in New South Wales, 1.0 km apart, using official ACARA 2025 data. Best value in each row is highlighted.
Ashfield Boys High School
Ashfield · Government high school · 7-12
751 students · ICSEA 1074
Trinity Grammar School
Summer Hill · Independent combined · K-12
2,296 students · ICSEA 1168
| Measure | Ashfield Boys High School Ashfield NSW | Trinity Grammar School Summer Hill NSW |
|---|---|---|
| Success Index | 69 Top 25% | 82 Top 10% |
| State rank (type) | #123 of 539 | #28 of 314 |
| National rank (type) | #309 of 1,472 | #72 of 1,259 |
| Sector | Government | Independent |
| Type | Secondary | Combined |
| Year range | 7-12 | K-12 |
| Students | 751 | 2,296 |
| Girls / boys | 0 / 751 | 0 / 2,296 |
| Foundation intake | – | 81 |
| Year 7 cohort | 122 | 273 |
| Year 12 cohort | 111 | 234 |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | +2% | +6% |
| ICSEA Average 1000 | 1074 | 1168 |
| ICSEA percentile | 77th | 98th |
| Top SEA quarter | 31% | 67% |
| Bottom SEA quarter | 14% | 1% |
| Students per teacher | 13.7 | 9.0 |
| Teaching staff (FTE) | 54.7 | 254.7 |
| Non-teaching staff (FTE) | 11.1 | 146.7 |
| Language background other than English | 60% | 61% |
| Indigenous students | 2% | 0% |
| Suburb | Ashfield 2131 | Summer Hill 2130 |
| Council area | Inner West | Inner West |
| Remoteness | Major Cities | Major Cities |
| Website | ashfieldbo-h.schools.nsw.gov.au | www.trinity.nsw.edu.au |
The verdict
- •Trinity Grammar School scores higher on the Success Index (82.2 vs 68.9).
- •Trinity Grammar School has the higher ICSEA (1168 vs 1074), indicating a more advantaged community.
- •Trinity Grammar School has fewer students per teacher (9.0 vs 13.7).
- •Trinity Grammar School is the larger school with 2,296 students compared with 751.
- •Ashfield Boys High School is a government school while Trinity Grammar School is an independent 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 Ashfield Boys High School better than Trinity Grammar School?
On the Success Index, Trinity Grammar School ranks higher (82.2 vs 68.9 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 Ashfield Boys High School and Trinity Grammar School?
About 1.0 km in a straight line, between Ashfield and Summer Hill in New South Wales.
Which has the better student-to-teacher ratio?
Ashfield Boys High School has 13.7 students per full-time-equivalent teacher and Trinity Grammar School has 9.0.
How do Ashfield Boys High School and Trinity Grammar School rank in NSW?
Ashfield Boys High School is 123rd of 539 and Trinity Grammar School is 28th of 314 among secondary schools in New South Wales on the 2025 Success Index.