Mt Roskill Grammar vs Onehunga High School
A head-to-head comparison of two secondary (year 9-15) schools in Auckland, New Zealand, 2.2 km apart, using official New Zealand 2026 data. The better value in each row is highlighted.
Mt Roskill Grammar
Mount Roskill · State secondary (year 9-15) · Years 9–13
1,929 students
Onehunga High School
Onehunga · State secondary (year 9-15) · Years 9–13
1,015 students
| Measure | Mt Roskill Grammar Mount Roskill, Auckland | Onehunga High School Onehunga, Auckland |
|---|---|---|
| Success Index (NZ) | 61 Top 50% | 53 Top 50% |
| Region rank | #53 of 101 | #65 of 101 |
| National rank | #159 of 486 | #212 of 486 |
| Sector | State | State |
| Type | Secondary (Year 9-15) | Secondary (Year 9-15) |
| Year range | Years 9–13 | Years 9–13 |
| Students | 1,929 | 1,015 |
| Equity Index (EQI) | 444 | 478 |
| Total roll | 1,929 | 1,015 |
| Roll growth (5 yrs) | -4.3% | 9.5% |
| Leavers with NCEA Level 2+ | 84.4% | 78.9% |
| Leavers with NCEA Level 3+ | – | – |
| Leavers with University Entrance | 65.8% | 65% |
| Māori students | 8.4% | 19.8% |
| Pacific students | 25.5% | 47.8% |
| International students | 3.5% | 3.2% |
| suburb or town | Mount Roskill | Onehunga |
| region | Auckland | Auckland |
| Website | www.mrgs.school.nz | www.onehungahigh.school.nz |
The verdict
- •Mt Roskill Grammar scores higher on the Success Index (NZ) (61.3 vs 53.4).
- •Mt Roskill Grammar does better on equity index (fewer barriers is higher) (444 vs 478).
- •Mt Roskill Grammar does better on roll size (1,929 vs 1,015).
- •Onehunga High School does better on roll growth (5 years) (9.5% vs -4.3%).
- •Mt Roskill Grammar does better on school leavers with ncea level 2+ (84.4% vs 78.9%).
- •Mt Roskill Grammar is the larger school with 1,929 students compared with 1,015.
The Success Index (NZ) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is Mt Roskill Grammar better than Onehunga High School?
On the Success Index (NZ), Mt Roskill Grammar ranks higher (61.3 vs 53.4 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Mt Roskill Grammar and Onehunga High School?
About 2.2 km in a straight line, between Mount Roskill and Onehunga in Auckland.
Which has the better Equity Index (EQI)?
Mt Roskill Grammar: 444. Onehunga High School: 478. Ministry of Education measure of socio-economic barriers faced by students; lower means fewer barriers.
How do Mt Roskill Grammar and Onehunga High School rank in Auckland?
Mt Roskill Grammar is 53rd of 101 and Onehunga High School is 65th of 101 among secondary (year 9-15) schools in Auckland on the 2026 Success Index (NZ).