St Mary's School
Updated Oct 2026 · ACARA 2025Altona, Victoria 3018 · Hobsons Bay LGA
#588 of 1,290 primary schools in VIC
#1662 of 4,908 nationally
About St Mary's School
St Mary's School is a catholic primary school located in Altona, Victoria (3018), within the Hobsons Bay local government area. It caters for students from Prep to 6 and in 2025 enrolled 259 students (138 girls and 121 boys). The school is affiliated with Victorian Catholic Education Authority.
St Mary's School has an ICSEA value of 1060, indicating above-average socio-educational advantage. That places it in the 72nd percentile of Australian schools. 21% of students come from the top socio-educational quarter and 13% from the bottom quarter.
The school employs 26 teachers (19.8 full-time equivalent) and 19 non-teaching staff, giving a student-to-teacher ratio of about 13.1 to 1. Enrolments have fallen by 6% over the past five years.
On the Success Index, St Mary's School scores 62.9 out of 100, placing it in the top 50% of primary schools nationally and 588th of 1,290 primary schools in VIC (17th of 20 in the Hobsons Bay area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1060
- Students in the top advantage quarter (15%)21% of students
- Teacher resourcing (students per teacher) (15%)13.1 students per teacher
- Enrolment growth vs local area (5 years) (10%)-6% enrolments since 2020 (area median -3%)
- ICSEA trend (5 years) (10%)-8 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 259 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.
Altona Primary School
Altona · Government primary · Prep-6
512 students · ICSEA 1111 · 508 m away
Seaholme Primary School
Seaholme · Government primary · Prep-6
298 students · ICSEA 1105 · 1.1 km away
Altona College
Altona · Government combined · Prep-12
796 students · ICSEA 1044 · 1.1 km away
Mount St Joseph Girls' College
Altona · Catholic high school · 7-12
1,216 students · ICSEA 1100 · 1.5 km away
Queen of Peace Primary School
Altona Meadows · Catholic primary · Prep-6
485 students · ICSEA 1064 · 3.4 km away
St Leo the Great Primary School
Altona North · Catholic primary · Prep-6
342 students · ICSEA 1116 · 3.6 km away
Australian Islamic Centre College
Newport · Independent primary · Prep-6
151 students · ICSEA 1032 · 3.8 km away
Altona North Primary School
Altona North · Government primary · Prep-6
217 students · ICSEA 994 · 3.8 km away
Emmanuel College
Altona North · Catholic high school · 7-12
2,533 students · ICSEA 1079 · 4.1 km away
Newport Gardens Primary School
Newport · Government primary · Prep-6
516 students · ICSEA 1106 · 4.2 km away
Similar schools
Catholic primary schools in VIC with a comparable ICSEA.
St Gabriel's School
Reservoir · Catholic primary · Prep-6
149 students · ICSEA 1060
St Mary of the Cross MacKillop Catholic Parish Primary School
Epping · Catholic primary · Prep-6
595 students · ICSEA 1060
Our Lady of Mount Carmel School
Sunbury · Catholic primary · Prep-6
299 students · ICSEA 1061
St Kilian's School
Bendigo · Catholic primary · Prep-6
268 students · ICSEA 1059
St Peter's School
Epping · Catholic primary · Prep-6
348 students · ICSEA 1061
Christ the King School
Newcomb · Catholic primary · Prep-6
269 students · ICSEA 1061
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 259 enrolled students (138 girls, 121 boys), a change of -6% 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 1060. 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 588th of 1,290 primary schools in Victoria on the Success Index (62.9/100), and 1662nd of 4,908 nationally.
What is the student-to-teacher ratio at St Mary's School?
St Mary's School has about 13.1 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 36 students in Prep and 34 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 Altona, about 758 m from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.