12 schools most similar to The Illawarra Grammar School in NSW, based on socio-educational profile, enrolment size, sector, and school type.
Similarity is calculated using ICSEA score (weighted ×3), enrolment size (×2), sector match (×2), and school type (×1.5). Higher match % means a more comparable school.
100%
Pittwater House Schools
Independent Combined Collaroy, NSW
1,002 students
1158 ICSEA
9.5:1 ratio
99%
St George Christian School
Independent Combined Hurstville, NSW
845 students
1159 ICSEA
12:1 ratio
99%
Kincoppal - Rose Bay School of the Sacred Heart
Independent Combined Rose Bay, NSW
851 students
1160 ICSEA
8.1:1 ratio
99%
St Catherine's School
Independent Combined Waverley, NSW
1,122 students
1156 ICSEA
10.3:1 ratio
99%
Covenant Christian School
Independent Combined Belrose, NSW
884 students
1155 ICSEA
12:1 ratio
99%
Kambala
Independent Combined Rose Bay, NSW
986 students
1169 ICSEA
8.9:1 ratio
98%
The Hills Grammar School
Independent Combined Kenthurst, NSW
1,208 students
1164 ICSEA
11.2:1 ratio
98%
Oxley College
Independent Combined Burradoo, NSW
827 students
1153 ICSEA
10.5:1 ratio
98%
Hills Adventist College
Independent Combined North Kellyville, NSW
823 students
1150 ICSEA
15:1 ratio
98%
Danebank - An Anglican School for Girls
Independent Combined Hurstville, NSW
1,043 students
1146 ICSEA
9.8:1 ratio
98%
Arden Anglican School, Junior Campus
Independent Combined Beecroft, NSW
997 students
1173 ICSEA
11.4:1 ratio
98%
Tara Anglican School for Girls
Independent Combined North Parramatta, NSW
979 students
1175 ICSEA
10.8:1 ratio
Similarity calculated from ACARA School Profile (2025) data.
ICSEA 1159 1158
Enrolments 970 1,002
Sector Independent Independent
Type Combined Combined
Year Range K-12 K-12
Student:Teacher 9.7:1 9.5:1
Location Wollongong West, NSW Collaroy, NSW
Compare The Illawarra Grammar School side-by-side with its closest matches on enrolments, ICSEA, staffing, and more.
Compare 4 Schools