The Illawarra Grammar School
Updated Oct 2026 · ACARA 2025Wollongong West, New South Wales 2500 · Wollongong LGA
#44 of 314 combined schools in NSW
#107 of 1,259 nationally
About The Illawarra Grammar School
The Illawarra Grammar School is an independent combined (K–12) school located in Wollongong West, New South Wales (2500), within the Wollongong local government area. It caters for students from K to 12 and in 2025 enrolled 970 students (464 girls and 506 boys). The school is affiliated with Independent Schools NSW.
The Illawarra Grammar School has an ICSEA value of 1159, indicating exceptionally high socio-educational advantage, among the most advantaged school communities in Australia. That places it in the 96th percentile of Australian schools. 64% of students come from the top socio-educational quarter and 2% from the bottom quarter.
The school employs 108 teachers (99.8 full-time equivalent) and 52 non-teaching staff, giving a student-to-teacher ratio of about 9.7 to 1. Enrolments have grown by 23% over the past five years.
On the Success Index, The Illawarra Grammar School scores 80.3 out of 100, placing it in the top 10% of combined schools nationally and 44th of 314 combined schools in NSW (1st of 5 in the Wollongong area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1159
- Students in the top advantage quarter (15%)64% of students
- Teacher resourcing (students per teacher) (15%)9.7 students per teacher
- Enrolment growth vs local area (5 years) (10%)+23% enrolments since 2020 (area median +25%)
- ICSEA trend (5 years) (10%)+5 ICSEA points since 2020
The Success Index summarises the academic environment of a school community using official ACARA data. It is not a measure of teaching quality or student results. Read the methodology.
Student profile
Distribution of students across socio-educational advantage (SEA) quarters, plus community characteristics.
Enrolments by year level
How The Illawarra Grammar School's 970 students are spread across year levels in 2025.
Enrolment trend
How enrolments at The Illawarra Grammar School have changed over the past decade.
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Schools near The Illawarra Grammar School
Closest schools by straight-line distance, with their Success Index.
St Therese Catholic Primary School
Mangerton · Catholic primary · K-6
368 students · ICSEA 1090 · 248 m away
Wollongong West Public School
Wollongong · Government primary · K-6
243 students · ICSEA 991 · 400 m away
Lindsay Park Public School
Wollongong · Government primary · K-6
334 students · ICSEA 1068 · 924 m away
Mount St Thomas Public School
Wollongong · Government primary · K-6
354 students · ICSEA 1070 · 977 m away
Edmund Rice College
West Wollongong · Independent high school · 7-12
1,054 students · ICSEA 1083 · 1.2 km away
Illawarra Hospital School
Wollongong · Government special
· 1.3 km away
Gwynneville Public School
Gwynneville · Government primary · K-6
271 students · ICSEA 1065 · 1.4 km away
Figtree Heights Public School
Figtree · Government primary · K-6
181 students · ICSEA 1061 · 1.4 km away
Keiraville Public School
Keiraville · Government primary · K-6
297 students · ICSEA 1103 · 1.6 km away
Novo Education Space
Wollongong · Independent special · 9-12
44 students · ICSEA 983 · 1.6 km away
Similar schools
Independent combined schools in NSW with a comparable ICSEA.
Saint Ignatius' College
Lane Cove · Independent combined · 5-12
1,613 students · ICSEA 1159
St George Christian School
Hurstville · Independent combined · K-12
845 students · ICSEA 1159
Kincoppal - Rose Bay School of the Sacred Heart
Rose Bay · Independent combined · K-12
851 students · ICSEA 1160
German International School Sydney
Terrey Hills · Independent combined · K-12
380 students · ICSEA 1158
Presbyterian Ladies' College Sydney
Croydon · Independent combined · K-12
1,495 students · ICSEA 1160
Pittwater House Schools
Collaroy · Independent combined · K-12
1,002 students · ICSEA 1158
Frequently asked questions
Is The Illawarra Grammar School a public or private school?
The Illawarra Grammar School is a Independent school, which makes it a non-government (private) school affiliated with Independent Schools NSW.
What year levels does The Illawarra Grammar School offer?
The Illawarra Grammar School offers K to 12. It is classified by ACARA as a combined school.
How many students attend The Illawarra Grammar School?
In 2025, The Illawarra Grammar School had 970 enrolled students (464 girls, 506 boys), a change of 23% over five years.
What is the ICSEA of The Illawarra Grammar School?
The Illawarra Grammar School has an ICSEA (Index of Community Socio-Educational Advantage) of 1159. The national average is 1000, so this indicates exceptionally high socio-educational advantage, among the most advantaged school communities in Australia. ICSEA reflects the school community, not teaching quality.
How does The Illawarra Grammar School rank in NSW?
The Illawarra Grammar School ranks 44th of 314 combined schools in New South Wales on the Success Index (80.3/100), and 107th of 1,259 nationally.
What is the student-to-teacher ratio at The Illawarra Grammar School?
The Illawarra Grammar School has about 9.7 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at The Illawarra Grammar School?
In 2025, The Illawarra Grammar School had 106 students in Year 7 and 92 in Year 12.
Is The Illawarra Grammar School co-ed?
Yes. The Illawarra Grammar School is a co-educational school enrolling both girls and boys.
What other schools are near The Illawarra Grammar School?
There are 10 other schools within 15 km of The Illawarra Grammar School in our database. Scroll up to the "Nearby schools" section to compare them by Success Index, ICSEA and enrolments, or use the Compare tool.
Where can I get tutoring near The Illawarra Grammar School?
The closest Success Tutoring centre is Success Tutoring Campbelltown, about 40 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.