Westminster School
Updated Oct 2026 · ACARA 2025Marion, South Australia 5043 · Marion LGA
#10 of 145 combined schools in SA
#139 of 1,259 nationally
About Westminster School
Westminster School is an independent combined (K–12) school located in Marion, South Australia (5043), within the Marion local government area. It caters for students from R to 12 and in 2025 enrolled 1,401 students (698 girls and 703 boys). The school is affiliated with Association of Independent Schools of SA.
Westminster School has an ICSEA value of 1139, indicating very high socio-educational advantage. That places it in the 93rd percentile of Australian schools. 56% of students come from the top socio-educational quarter and 3% from the bottom quarter.
The school employs 143 teachers (133.7 full-time equivalent) and 127 non-teaching staff, giving a student-to-teacher ratio of about 10.5 to 1. Enrolments have grown by 29% over the past five years.
On the Success Index, Westminster School scores 77.8 out of 100, placing it in the top 10% of combined schools nationally and 10th of 145 combined schools in SA (2nd of 6 in the Marion area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1139
- Students in the top advantage quarter (15%)56% of students
- Teacher resourcing (students per teacher) (15%)10.5 students per teacher
- Enrolment growth vs local area (5 years) (10%)+29% enrolments since 2020 (area median +33%)
- ICSEA trend (5 years) (10%)+25 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 Westminster School's 1,401 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Westminster School have changed over the past decade.
Free academic assessment
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Schools near Westminster School
Closest schools by straight-line distance, with their Success Index.
Marion Primary School
Marion · Government primary · R-6
149 students · ICSEA 1032 · 345 m away
Hamilton Secondary College
Mitchell Park · Government high school · U, 7-12
609 students · ICSEA 994 · 854 m away
SA School and Services for Vision Impaired
Park Holme · Government special · U
20 students · ICSEA 965 · 1.2 km away
Kilparrin Teaching and Assessment School and Services
Park Holme · Government special · U
34 students · ICSEA 1035 · 1.2 km away
Clovelly Park Primary School
Clovelly Park · Government primary · U, R-6
222 students · ICSEA 1038 · 1.2 km away
Ascot Park Primary School
Park Holme · Government primary · R-6
189 students · ICSEA 1025 · 1.3 km away
Warradale Primary School
Warradale · Government primary · R-6
286 students · ICSEA 1032 · 1.4 km away
Christ the King School
Warradale · Catholic primary · R-6
179 students · ICSEA 1079 · 1.5 km away
Suneden Specialist School
Mitchell Park · Independent special · U
72 students · ICSEA 1065 · 1.5 km away
Dara School
Morphettville · Independent combined · R-10
93 students · ICSEA 1176 · 1.6 km away
Similar schools
Independent combined schools in SA with a comparable ICSEA.
Concordia College
Highgate · Independent combined · R-12
1,312 students · ICSEA 1140
Emmaus Christian College
South Plympton · Independent combined · R-12
1,084 students · ICSEA 1137
St John's Grammar School
Belair · Independent combined · R-12
1,009 students · ICSEA 1141
Prince Alfred College
Kent Town · Independent combined · R-12
1,127 students · ICSEA 1143
Scotch College
Torrens Park · Independent combined · R-12
1,213 students · ICSEA 1146
Seymour College
Glen Osmond · Independent combined · R-12
715 students · ICSEA 1150
Frequently asked questions
Is Westminster School a public or private school?
Westminster School is a Independent school, which makes it a non-government (private) school affiliated with Association of Independent Schools of SA.
What year levels does Westminster School offer?
Westminster School offers R to 12. It is classified by ACARA as a combined school.
How many students attend Westminster School?
In 2025, Westminster School had 1,401 enrolled students (698 girls, 703 boys), a change of 29% over five years.
What is the ICSEA of Westminster School?
Westminster School has an ICSEA (Index of Community Socio-Educational Advantage) of 1139. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does Westminster School rank in SA?
Westminster School ranks 10th of 145 combined schools in South Australia on the Success Index (77.8/100), and 139th of 1,259 nationally.
What is the student-to-teacher ratio at Westminster School?
Westminster School has about 10.5 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Westminster School?
In 2025, Westminster School had 139 students in Year 7 and 159 in Year 12.
Is Westminster School co-ed?
Yes. Westminster School is a co-educational school enrolling both girls and boys.
What other schools are near Westminster School?
There are 10 other schools within 15 km of Westminster 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 Westminster School?
The closest Success Tutoring centre is Success Tutoring Windsor Gardens, about 18 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.