Onslow College
Burma Road, Johnsonville
See all schools in Johnsonville →
Composite score
Established
Top 25% in NZ
Rank #588 of scored NZ schools
In summary
Onslow College's December 2022 board assurance review found the board had met regulatory and legislative requirements as of October 2022, with board administration and curriculum requirements confirmed as met. No composite score was available for this review period.
Best suited for
Students aged 13-18 in Johnsonville looking for a state-funded setting with an established ERO profile.
Is Onslow College a good school?
Onslow College scores 77/100 on the SchoolsNearMe composite — a weighted average of 5 axes (academic, outcomes, retention, wellbeing, trajectory). Top 25% in NZ nationally. ERO trajectory is improving across recent review cycles. The full breakdown is below; every input links to its source.
Summary derived from ERO reports + audited financials + MoE records. Every claim links to its source — see data transparency at the bottom of this page.
Score breakdown
6 axes, each scored 0–100 on a national absolute scale. As at 2025.
L1 92% · L2 88% · UE 71% · bottom quartile of band (n=66) · why? ▼ hide
Uni 57% · Te Pūkenga 7% · Industry 5% · above band median (n=64) · why? ▼ hide
91% to Y13 · bottom quartile of band (n=66) · why? ▼ hide
standdowns 24.1/1k · suspensions 0.8/1k · exclusions 0.5/1k · bottom quartile of band (n=536) · why? ▼ hide
-4.9% roll over 5yr (2020→2025) · near band median (n=534) · why? ▼ hide
85/100 from ERO review 2022-12 · top quartile of band (n=539) · why? ▼ hide
⚠ Insufficient EQI-band peers (n<10) to compute per-axis percentile context. The score above is absolute; treat it as a single-school read rather than a peer comparison.
Real ERO composite (from the latest review): 85/100.
Latest ERO review
2022-12-06 · Dr Lesley Patterson, Southern Region | Te Tai Tini
- Board has attested to meeting regulatory and legislative requirements as of October 2022
- Board Administration requirements met
- Curriculum requirements met
- Management of Health, Safety and Welfare requirements met
- Personnel Management requirements met
"As of October 2022, the Onslow College, School Board has attested to the following regulatory and legislative requirements"
Composite score across reviews
3 ERO reviews on file, 2014–2022. Click a point to read that review.
Trajectory across review cycles
Year-over-year change per dimension based on consecutive ERO reviews.
Onslow College made significant progress on equity between 2014 and 2017, particularly for Māori students. The 2014 report identified Māori achievement as "of concern, with proportionally lower NCEA Level 2 completion," while the 2017 report documented "significant improvements in Māori student achievement at Levels 2 and 3 since 2014" with the disparity between Māori and non-Māori peers substantially reduced. However, a new equity concern emerged regarding Pacific learners.
2014-08 → 2017-11 diff source
Onslow College demonstrated significant improvement in Māori student achievement between 2014 and 2017. The 2014 report identified "achievement for a significant number of Māori students is of concern, with proportionally lower NCEA Level 2 completion," while the 2017 report documented "significant improvements in Māori student achievement at Levels 2 and 3 since 2014" and noted "strong progress toward achieving equity in educational outcomes."
2014-08 → 2017-11 diff source
Achievement overall improved modestly from a score of 80 to 82. The 2017 report highlights significant progress, particularly 'significant improvements in Māori student achievement at Levels 2 and 3 since 2014' and notes that 'NCEA results are above national figures,' whereas the 2014 report acknowledged that 'Achievement for a significant number of Māori students is of concern, with proportionally lower NCEA Level 2 completion.'
2014-08 → 2017-11 diff source
Both reports describe leadership positively and assign the same rating and score. The 2014 report emphasizes the principal's clear vision and a cohesive executive team, while the 2017 report shifts focus to collaborative leadership sustaining teaching practice and guiding ongoing improvement, suggesting evolution from individual principal vision to more distributed collaborative leadership model.
2014-08 → 2017-11 diff source
Audited financials
Year ended 2024 · Audit opinion: unmodified
Total revenue
$18.11M
Surplus / (deficit)
+$279k
Net assets / equity
$3.11M
2 years of audited data on file · View full history (Pro)
NCEA achievement
School leavers with NCEA at each level. National average is ~85% (Level 1).
NCEA Level 1 · 2024
92.1%
278 of 302 leavers
-1.4pt vs prior year
NCEA Level 2 · 2024
88.1%
266 of 302 leavers
+0.4pt vs prior year
University Entrance · 2024
71.2%
215 of 302 leavers
+3.1pt vs prior year
Data: Ministry of Education / Education Counts, CC-BY-4.0
Stay-on rate
Percentage of students who stay at school until at least their 17th birthday — the standard NZ proxy for Year-9-to-Year-13 retention.
90.7%
2024 cohort · 302 students
+1.6pt vs 2023
Discipline (age-standardised, per 1,000 students)
Stand-down = sent home temporarily. Suspension = formal investigation. Exclusion = removed from school. National averages shown for comparison.
Stand-downs · 2024
24.1
52 this year · NZ avg ~37
Suspensions · 2024
0.8
2 this year · NZ avg ~5
Exclusions · 2024
0.5
1 this year · NZ avg ~1.5
Vocational Pathway Awards
School leavers achieving Vocational Pathway Awards by industry sector (2024).
- Creative Industries 28
- Service Industries 2
- Construction and Infrastructure 1
- Manufacturing and Technology 1
Government funding
Crown funding only (school operations + teacher salaries + property). Excludes locally-raised funds, international fees and trading income — those are in the audited financial report above.
Total Crown funding · 2022
$15.04M
Per-student funding · 2022
$11,936
2018
$8.9M
2019
$9.8M
2020
$16.1M
2021
$13.0M
2022
$15.0M
Roll by year level
July 2025 roll return.
- Year 09 197
- Year 10 271
- Year 11 292
- Year 12 243
- Year 13+ 279
Roll by ethnicity
Share of total roll. Students who identify with multiple ethnicities are counted once.
- European/Pākehā 70.2%
- Asian 23.8%
- Māori 11.6%
- Other / MELAA 9.0%
- Pacific 3.6%
- International 2.6%
International students
SIEBA member · Day school only
Location
Burma Road, Johnsonville. Nearby schools marked in grey.
Map tiles © OpenStreetMap, © CARTO
Schools nearby
Within 15km, sorted by distance. Add any to compare with Onslow College.
Raroa Normal Intermediate
Intermediate · 0.2km · 594 roll
76
-1 vs this
West Park School
Contributing · 0.8km · 296 roll
67
-10 vs this
Wellington Hills Christian College
Composite · 1.1km · 124 roll
97
+20 vs this
St Brigids School (Johnsonville)
Full Primary · 1.1km · 308 roll
78
+1 vs this
Khandallah School
Contributing · 1.5km · 305 roll
67
-10 vs this
Johnsonville School
Contributing · 1.5km · 367 roll
74
-3 vs this
Frequently asked
Is Onslow College a good school?
Onslow College scores 77/100 on the SchoolsNearMe composite — a weighted average of 5 axes (academic, outcomes, retention, wellbeing, trajectory). Top 25% in NZ nationally. ERO trajectory is improving across recent review cycles. The full breakdown is below; every input links to its source.
What does the latest ERO review say?
ERO's 2022-12 review identified 6 key findings. Board has attested to meeting regulatory and legislative requirements as of October 2022
How do I enrol my child at Onslow College?
Contact the school directly on 04-4788189, email info@onslow.school.nz, or visit www.onslow.school.nz. For state schools, check your home address against the school's enrolment zone — some schools are in-zone-only.
What are the fees?
Onslow College is a state school. There is no tuition fee for domestic students; voluntary donations may be requested.
What is the roll size?
Onslow College has 1,260 students, with an EQI of 398 (lower socio-economic need).
When was the school last reviewed by ERO?
The Education Review Office last reviewed Onslow College in 2022-12, signed by Dr Lesley Patterson. 5 ERO reports are on file in our archive.
Data transparency
Every fact on this page links to its source. We never publish a claim without provenance — read our methodology for the full rules.
Sourced from
- ero.govt.nz
- onslow.school.nz
- sieba.nz
- schoolsdata.co.nz
- crimestats.co.nz