St Mary's School
Updated Oct 2026 · ACARA 2025Thornbury, Victoria 3071 · Darebin LGA
#362 of 1,290 primary schools in VIC
#854 of 4,908 nationally
About St Mary's School
St Mary's School is a catholic primary school located in Thornbury, Victoria (3071), within the Darebin local government area. It caters for students from Prep to 6 and in 2025 enrolled 113 students (61 girls and 52 boys). The school is affiliated with Victorian Catholic Education Authority.
St Mary's School has an ICSEA value of 1089, indicating above-average socio-educational advantage. That places it in the 81st percentile of Australian schools. 36% of students come from the top socio-educational quarter and 13% from the bottom quarter.
The school employs 15 teachers (11.6 full-time equivalent) and 13 non-teaching staff, giving a student-to-teacher ratio of about 9.7 to 1. Enrolments have fallen by 54% over the past five years.
On the Success Index, St Mary's School scores 71.7 out of 100, placing it in the top 25% of primary schools nationally and 362nd of 1,290 primary schools in VIC (17th of 28 in the Darebin area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1089
- Students in the top advantage quarter (15%)36% of students
- Teacher resourcing (students per teacher) (15%)9.7 students per teacher
- Enrolment growth vs local area (5 years) (10%)-54% enrolments since 2020 (area median -2%)
- ICSEA trend (5 years) (10%)+12 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 St Mary's School's 113 students are spread across year levels in 2025.
Enrolment trend
How enrolments at St Mary's School have changed over the past decade.
Free academic assessment
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Schools near St Mary's School
Closest schools by straight-line distance, with their Success Index.
Thornbury Primary School
Thornbury · Government primary · Prep-6
308 students · ICSEA 1093 · 459 m away
Wales Street Primary School
Thornbury · Government primary · Prep-6
616 students · ICSEA 1140 · 817 m away
Preston South Primary School
Preston · Government primary · Prep-6
397 students · ICSEA 1127 · 1.1 km away
Penders Grove Primary School
Thornbury · Government primary · Prep-6
160 students · ICSEA 1021 · 1.1 km away
St John's College Preston
Preston · Independent combined · Prep-12
345 students · ICSEA 1066 · 1.2 km away
Sacred Heart School
Preston · Catholic primary · Prep-6
117 students · ICSEA 1090 · 1.4 km away
Holy Spirit School
Thornbury · Catholic primary · Prep-6
129 students · ICSEA 1107 · 1.4 km away
Bell Primary School
Preston · Government primary · Prep-6
440 students · ICSEA 1165 · 1.4 km away
Croxton School
Northcote · Government special · U
130 students · ICSEA 1008 · 1.5 km away
Santa Maria College
Northcote · Catholic high school · 7-12
779 students · ICSEA 1110 · 1.5 km away
Similar schools
Catholic primary schools in VIC with a comparable ICSEA.
St Thomas More's School
Belgrave · Catholic primary · Prep-6
101 students · ICSEA 1089
Sacred Heart School
Preston · Catholic primary · Prep-6
117 students · ICSEA 1090
St Columba's School
Ballarat North · Catholic primary · Prep-6
334 students · ICSEA 1090
Ss Peter & Paul's School
Doncaster East · Catholic primary · Prep-6
60 students · ICSEA 1088
Emmaus Catholic Primary School
Mount Clear · Catholic primary · Prep-6
362 students · ICSEA 1088
St Brigid's School
Mordialloc · Catholic primary · Prep-6
169 students · ICSEA 1091
Frequently asked questions
Is St Mary's School a public or private school?
St Mary's School is a Catholic school, which makes it a non-government (private) school affiliated with Victorian Catholic Education Authority.
What year levels does St Mary's School offer?
St Mary's School offers Prep to 6. It is classified by ACARA as a primary school.
How many students attend St Mary's School?
In 2025, St Mary's School had 113 enrolled students (61 girls, 52 boys), a change of -54% over five years.
What is the ICSEA of St Mary's School?
St Mary's School has an ICSEA (Index of Community Socio-Educational Advantage) of 1089. The national average is 1000, so this indicates above-average socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does St Mary's School rank in VIC?
St Mary's School ranks 362nd of 1,290 primary schools in Victoria on the Success Index (71.7/100), and 854th of 4,908 nationally.
What is the student-to-teacher ratio at St Mary's School?
St Mary's School has about 9.7 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How many students start Prep at St Mary's School each year?
In 2025, St Mary's School had 8 students in Prep and 26 in Year 6.
Is St Mary's School co-ed?
Yes. St Mary's School is a co-educational school enrolling both girls and boys.
What other schools are near St Mary's School?
There are 10 other schools within 15 km of St Mary's 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 St Mary's School?
The closest Success Tutoring centre is Success Tutoring Docklands, about 8.1 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.