St Mary's School
Updated Oct 2026 · ACARA 2025Castlemaine, Victoria 3450 · Mount Alexander LGA
About St Mary's School
St Mary's School is a catholic primary school located in Castlemaine, Victoria (3450), within the Mount Alexander local government area. It caters for students from Prep to 6 and in 2025 enrolled 64 students (37 girls and 27 boys). The school is affiliated with Victorian Catholic Education Authority.
St Mary's School has an ICSEA value of 1033, indicating a socio-educational profile close to the national average of 1000. That places it in the 61st percentile of Australian schools. 19% of students come from the top socio-educational quarter and 23% from the bottom quarter.
The school employs 10 teachers (5.6 full-time equivalent) and 6 non-teaching staff, giving a student-to-teacher ratio of about 10.7 to 1. Enrolments have fallen by 26% over the past five years.
On the Success Index, St Mary's School scores 56.9 out of 100. Because it has fewer than 80 students it is not included in ranking tables, where small enrolments make year-to-year comparisons unreliable.
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1033
- Students in the top advantage quarter (15%)19% of students
- Teacher resourcing (students per teacher) (15%)10.7 students per teacher
- Enrolment growth vs local area (5 years) (10%)-26% enrolments since 2020 (area median -5%)
- ICSEA trend (5 years) (10%)-33 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 64 students are spread across year levels in 2025.
Enrolment trend
How enrolments at St Mary's School have changed over the past decade.
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Schools near St Mary's School
Closest schools by straight-line distance, with their Success Index.
Castlemaine Primary School
Castlemaine · Government primary · Prep-6
178 students · ICSEA 1054 · 349 m away
Castlemaine North Primary School
Castlemaine · Government primary · Prep-6
278 students · ICSEA 1117 · 671 m away
Winters Flat Primary School
Castlemaine · Government primary · Prep-6
115 students · ICSEA 1078 · 1.4 km away
Castlemaine Secondary College
Castlemaine · Government high school · 7-12
695 students · ICSEA 1040 · 1.6 km away
Campbells Creek Primary School
Campbells Creek · Government primary · Prep-6
174 students · ICSEA 1011 · 3.6 km away
Chewton Primary School
Chewton · Government primary · Prep-6
54 students · ICSEA 1119 · 4.1 km away
Castlemaine Steiner School & Kindergarten
Muckleford · Independent combined · Prep-8
135 students · ICSEA 1105 · 6.0 km away
Harcourt Valley Primary School
Harcourt · Government primary · Prep-6
73 students · ICSEA 1015 · 7.5 km away
Elphinstone Primary School
Elphinstone · Government primary · Prep-6
29 students · ICSEA 1036 · 11 km away
Taradale Primary School
Taradale · Government primary · Prep-6
74 students · ICSEA 1075 · 14 km away
Similar schools
Catholic primary schools in VIC with a comparable ICSEA.
St John's School
Euroa · Catholic primary · Prep-6
199 students · ICSEA 1033
St Monica's School
Kangaroo Flat · Catholic primary · Prep-6
284 students · ICSEA 1032
St Joseph's School
Nagambie · Catholic primary · Prep-6
52 students · ICSEA 1034
St James' School
Sebastopol · Catholic primary · Prep-6
166 students · ICSEA 1034
St Mary's School
Whittlesea · Catholic primary · Prep-6
262 students · ICSEA 1032
St Bernard's School
Bacchus Marsh · Catholic primary · Prep-6
328 students · ICSEA 1035
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 64 enrolled students (37 girls, 27 boys), a change of -26% 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 1033. The national average is 1000, so this indicates a socio-educational profile close to the national average of 1000. ICSEA reflects the school community, not teaching quality.
What is the student-to-teacher ratio at St Mary's School?
St Mary's School has about 10.7 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 7 students in Prep and 7 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 Craigieburn, about 85 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.