International Grammar School
Updated Oct 2026 · ACARA 2025Ultimo, New South Wales 2007 · Sydney LGA
#32 of 314 combined schools in NSW
#77 of 1,259 nationally
About International Grammar School
International Grammar School is an independent combined (K–12) school located in Ultimo, New South Wales (2007), within the Sydney local government area. It caters for students from K to 12 and in 2025 enrolled 1,224 students (527 girls and 697 boys). The school is affiliated with Independent Schools NSW.
International Grammar School has an ICSEA value of 1170, indicating exceptionally high socio-educational advantage, among the most advantaged school communities in Australia. That places it in the 98th percentile of Australian schools. 71% of students come from the top socio-educational quarter and 2% from the bottom quarter.
The school employs 132 teachers (126.5 full-time equivalent) and 62 non-teaching staff, giving a student-to-teacher ratio of about 9.7 to 1. Enrolments have grown by 4% over the past five years.
On the Success Index, International Grammar School scores 81.9 out of 100, placing it in the top 10% of combined schools nationally and 32nd of 314 combined schools in NSW (4th of 6 in the Sydney area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1170
- Students in the top advantage quarter (15%)71% of students
- Teacher resourcing (students per teacher) (15%)9.7 students per teacher
- Enrolment growth vs local area (5 years) (10%)+4% enrolments since 2020 (area median +5%)
- ICSEA trend (5 years) (10%)+3 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 International Grammar School's 1,224 students are spread across year levels in 2025.
Enrolment trend
How enrolments at International Grammar School have changed over the past decade.
Free academic assessment
Is your child on track at International Grammar School?
Rankings tell you about a school community. A free Success Tutoring assessment tells you about your child: exactly where they are in English and Maths, where the gaps are, and a plan to close them. Small-group, Australian-curriculum tutoring with no lock-in contracts.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Your nearest centre: Success Tutoring Lane Cove
Schools near International Grammar School
Closest schools by straight-line distance, with their Success Index.
Australian Performing Arts Grammar School
Glebe · Independent high school · 7-12
129 students · ICSEA 1103 · 325 m away
GOAL College
Ultimo · Independent special · 11-12
204 students · ICSEA 1027 · 436 m away
Westbourne College Sydney
Ultimo · Independent high school · 10-12
65 students · ICSEA 1153 · 443 m away
Glebe Public School
Glebe · Government primary · K-6
193 students · ICSEA 982 · 456 m away
Ultimo Public School
Ultimo · Government primary · K-6
483 students · ICSEA 1088 · 565 m away
Sydney Secondary College Blackwattle Bay Campus
Glebe · Government high school · 11-12
798 students · ICSEA 1094 · 966 m away
St James Catholic Primary School
Glebe · Catholic primary · K-6
152 students · ICSEA 1125 · 969 m away
Key College
Redfern · Independent special · 9-12
70 students · ICSEA 909 · 1.1 km away
Australian International High School
Sydney · Independent high school
· ICSEA 1028 · 1.3 km away
Forest Lodge Public School
Forest Lodge · Government primary · K-6
307 students · ICSEA 1161 · 1.3 km away
Similar schools
Independent combined schools in NSW with a comparable ICSEA.
Kambala
Rose Bay · Independent combined · K-12
986 students · ICSEA 1169
Trinity Grammar School
Summer Hill · Independent combined · K-12
2,296 students · ICSEA 1168
Queenwood
Mosman · Independent combined · K-12
816 students · ICSEA 1172
Lycee Condorcet The International French School Of Sydney
Maroubra Junction · Independent combined · K-12
1,129 students · ICSEA 1173
Arden Anglican School, Junior Campus
Beecroft · Independent combined · K-12
997 students · ICSEA 1173
Barker College
Hornsby · Independent combined · K-12
2,856 students · ICSEA 1166
Frequently asked questions
Is International Grammar School a public or private school?
International Grammar School is a Independent school, which makes it a non-government (private) school affiliated with Independent Schools NSW.
What year levels does International Grammar School offer?
International Grammar School offers K to 12. It is classified by ACARA as a combined school.
How many students attend International Grammar School?
In 2025, International Grammar School had 1,224 enrolled students (527 girls, 697 boys), a change of 4% over five years.
What is the ICSEA of International Grammar School?
International Grammar School has an ICSEA (Index of Community Socio-Educational Advantage) of 1170. 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 International Grammar School rank in NSW?
International Grammar School ranks 32nd of 314 combined schools in New South Wales on the Success Index (81.9/100), and 77th of 1,259 nationally.
What is the student-to-teacher ratio at International Grammar School?
International 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 International Grammar School?
In 2025, International Grammar School had 103 students in Year 7 and 106 in Year 12.
Is International Grammar School co-ed?
Yes. International Grammar School is a co-educational school enrolling both girls and boys.
What other schools are near International Grammar School?
There are 10 other schools within 15 km of International 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 International Grammar School?
The closest Success Tutoring centre is Success Tutoring Lane Cove, about 7.9 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.