Immaculate Heart of Mary Catholic Primary School vs Sefton High School
A head-to-head comparison of two schools in New South Wales, 814 m apart, using official ACARA 2025 data. Best value in each row is highlighted.
Immaculate Heart of Mary Catholic Primary School
Sefton · Catholic primary · K-6
337 students · ICSEA 1046
Sefton High School
Sefton · Government high school · 7-12
1,121 students · ICSEA 1033
| Measure | Immaculate Heart of Mary Catholic Primary School Sefton NSW | Sefton High School Sefton NSW |
|---|---|---|
| Success Index | 57 Top 50% | 57 Top 50% |
| State rank (type) | #710 of 1,619 | #226 of 539 |
| National rank (type) | #2167 of 4,908 | #579 of 1,472 |
| Sector | Catholic | Government |
| Type | Primary | Secondary |
| Year range | K-6 | 7-12 |
| Students | 337 | 1,121 |
| Girls / boys | 168 / 169 | 541 / 580 |
| Foundation intake | 52 | – |
| Year 7 cohort | – | 183 |
| Year 12 cohort | – | 180 |
| VCE median study score VCAA, latest year | – | – |
| VCE study scores 40+ | – | – |
| 5-year enrolment growth | -7% | +5% |
| ICSEA Average 1000 | 1046 | 1033 |
| ICSEA percentile | 67th | 61th |
| Top SEA quarter | 19% | 21% |
| Bottom SEA quarter | 19% | 29% |
| Students per teacher | 16.5 | 14.8 |
| Teaching staff (FTE) | 20.4 | 76.0 |
| Non-teaching staff (FTE) | 7.2 | 14.0 |
| Language background other than English | 84% | 94% |
| Indigenous students | 1% | 0% |
| Suburb | Sefton 2162 | Sefton 2162 |
| Council area | Canterbury-Bankstown | Canterbury-Bankstown |
| Remoteness | Major Cities | Major Cities |
| Website | ihmsefton.syd.catholic.edu.au | sefton-h.schools.nsw.gov.au |
The verdict
- •Both schools have almost identical Success Index scores (56.9 vs 57.2).
- •Immaculate Heart of Mary Catholic Primary School has the higher ICSEA (1046 vs 1033), indicating a more advantaged community.
- •Sefton High School has fewer students per teacher (14.8 vs 16.5).
- •Sefton High School is the larger school with 1,121 students compared with 337.
- •Sefton High School has grown faster over five years (5% vs -7%).
- •Immaculate Heart of Mary Catholic Primary School is a catholic school while Sefton High School 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 Immaculate Heart of Mary Catholic Primary School better than Sefton High 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 Immaculate Heart of Mary Catholic Primary School and Sefton High School?
About 814 m in a straight line, between Sefton and Sefton in New South Wales.
Which has the better student-to-teacher ratio?
Immaculate Heart of Mary Catholic Primary School has 16.5 students per full-time-equivalent teacher and Sefton High School has 14.8.
How do Immaculate Heart of Mary Catholic Primary School and Sefton High School rank in NSW?
Immaculate Heart of Mary Catholic Primary School is 710th of 1,619 and Sefton High School is 226th of 539 among primary schools in New South Wales on the 2025 Success Index.