Onslow College
🇳🇿 Official data · 2026Johnsonville, Wellington 6440 · Wellington City
#9 of 46 secondary (year 9-15) schools in Wellington
#80 of 486 nationally
About Onslow College
Onslow College is a state secondary (year 9-15) located in Johnsonville, in the Wellington City territorial authority of Wellington, New Zealand. It caters for Years 9–13. In 2026 it enrolled 1,180 students. Government-funded schools, free to attend apart from donations and activity fees.
Its Success Index (NZ) is 73.5 out of 100, placing it in the top 25% of secondary (year 9-15) schools in New Zealand and 9th of 46 ranked secondary (year 9-15) schools in Wellington. Its strongest component is equity index (fewer barriers is higher) (93th percentile), and its weakest is roll growth (5 years) (14th percentile).
Other published figures: māori students 12.3%; pacific students 3.9%; international students 3.4%.
There are 6 schools in Johnsonville; Onslow College ranks 4th of 6 scored schools there.
Success Index (NZ) breakdown
Each component is a percentile against secondary (year 9-15) schools across New Zealand.
- Equity Index (fewer barriers is higher) (45%)398
- Roll size (10%)1,180
- Roll growth (5 years) (15%)-4.9%
- School leavers with NCEA Level 2+ (20%)89.3%
- School leavers with University Entrance (10%)73.7%
The Success Index (NZ) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Onslow College by the official sources.
- Equity Index (EQI)
- 398
- Ministry of Education measure of socio-economic barriers faced by students; lower means fewer barriers.
- Total roll
- 1,180
- Total enrolled students.
- Roll growth (5 yrs)
- -4.9%
- Change in total roll over five years.
- Leavers with NCEA Level 2+
- 89.3%
- Share of school leavers who attained at least NCEA Level 2 before leaving.
- Leavers with University Entrance
- 73.7%
- Share of school leavers who attained the University Entrance award.
- Māori students
- 12.3%
- Share of roll identifying as Māori.
- Pacific students
- 3.9%
- Share of roll identifying as Pacific peoples.
- International students
- 3.4%
- Share of roll who are international fee-paying students.
Total roll trend
How total roll at Onslow College has changed over time.
Leavers with NCEA Level 2+ trend
How leavers with ncea level 2+ at Onslow College has changed over time.
Leavers with University Entrance trend
How leavers with university entrance at Onslow College has changed over time.
Free academic assessment
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Schools near Onslow College
Closest schools by straight-line distance, with their Success Index (NZ).
Raroa Normal Intermediate
Johnsonville · State intermediate · Years 7–8
531 students · 246 m away
West Park School
Johnsonville · State contributing · Years 1–6
259 students · 804 m away
Wellington Hills Christian College
Johnsonville · State integrated composite · Years 1–13
180 students · 1.1 km away
St Brigids School (Johnsonville)
Johnsonville · State integrated full primary · Years 1–8
298 students · 1.1 km away
Khandallah School
Khandallah · State contributing · Years 1–6
305 students · 1.5 km away
Johnsonville School
Johnsonville · State contributing · Years 1–6
356 students · 1.5 km away
Cashmere Avenue School
Khandallah · State contributing · Years 1–6
317 students · 1.8 km away
St Benedict's School (Khandallah)
Khandallah · State integrated full primary · Years 1–8
205 students · 2.0 km away
Newlands School
Newlands · State contributing · Years 1–6
320 students · 2.1 km away
Rewa Rewa School
Newlands · State contributing · Years 1–6
143 students · 2.2 km away
Similar schools
State secondary (year 9-15) schools in Wellington with a comparable Equity Index (EQI).
Wellington High School and Com Ed Centre
Wellington · State secondary (year 9-15) · Years 9–13
1,652 students
Newlands College
Newlands · State secondary (year 9-15) · Years 9–13
1,254 students
Wellington College
Mount Victoria · State secondary (year 9-15) · Years 9–13
1,934 students
Wellington East Girls' College
Mount Victoria · State secondary (year 9-15) · Years 9–13
996 students
Hutt Valley High School
Lower Hutt · State secondary (year 9-15) · Years 9–13
2,001 students
Wellington Girls' College
Thorndon · State secondary (year 9-15) · Years 9–13
1,423 students
Frequently asked questions
Is Onslow College a good school?
Onslow College has a Success Index (NZ) of 73.5 out of 100 (Top 25% of secondary (year 9-15) schools in New Zealand) and ranks #9 of 46 in Wellington. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Onslow College rank in Wellington?
Onslow College ranks #9 of 46 secondary (year 9-15) schools in Wellington and #80 of 486 nationally on the Success Index (NZ) (2026 data).
How many students attend Onslow College?
Onslow College had 1,180 students in 2026, a change of -5% over five years.
Is Onslow College a primary school or a secondary school?
Onslow College is classified as a secondary (year 9-15) covering Years 9–13. It is a state school.
What other schools are near Onslow College?
There are 10 schools within 15 km of Onslow College; they are listed on this page with their Success Index (NZ) and distance, and can be compared side by side.