Holy Trinity Catholic Primary School
Updated Oct 2026 · ACARA 2025Sunbury, Victoria 3429 · Hume LGA
#348 of 1,290 primary schools in VIC
#808 of 4,908 nationally
About Holy Trinity Catholic Primary School
Holy Trinity Catholic Primary School is a catholic primary school located in Sunbury, Victoria (3429), within the Hume local government area. It caters for students from Prep to 6 and in 2025 enrolled 431 students (214 girls and 217 boys). The school is affiliated with Victorian Catholic Education Authority.
Holy Trinity Catholic Primary School has an ICSEA value of 1065, indicating above-average socio-educational advantage. That places it in the 74th percentile of Australian schools. 24% of students come from the top socio-educational quarter and 13% from the bottom quarter.
The school employs 33 teachers (29.5 full-time equivalent) and 15 non-teaching staff, giving a student-to-teacher ratio of about 14.6 to 1. Enrolments have grown by 215% over the past five years.
On the Success Index, Holy Trinity Catholic Primary School scores 72.2 out of 100, placing it in the top 25% of primary schools nationally and 348th of 1,290 primary schools in VIC (1st of 47 in the Hume area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1065
- Students in the top advantage quarter (15%)24% of students
- Teacher resourcing (students per teacher) (15%)14.6 students per teacher
- Enrolment growth vs local area (5 years) (10%)+215% enrolments since 2020 (area median -12%)
- ICSEA trend (5 years) (10%)+17 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 Holy Trinity Catholic Primary School's 431 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Holy Trinity Catholic Primary School have changed over the past decade.
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Schools near Holy Trinity Catholic Primary School
Closest schools by straight-line distance, with their Success Index.
Sunbury Downs Secondary College
Sunbury · Government high school · 7-12
789 students · ICSEA 1005 · 82 m away
Sunbury Heights Primary School
Sunbury · Government primary · Prep-6
495 students · ICSEA 983 · 409 m away
Sunbury West Primary School
Sunbury · Government primary · Prep-6
230 students · ICSEA 1004 · 1.3 km away
St Anne's School
Sunbury · Catholic primary · Prep-6
599 students · ICSEA 1059 · 2.1 km away
Killara Primary School
Sunbury · Government primary · Prep-6
317 students · ICSEA 1017 · 2.3 km away
Sunbury College
Sunbury · Government high school · 7-12
980 students · ICSEA 993 · 2.4 km away
Sunbury And Macedon Ranges Specialist School
Sunbury · Government special · U
283 students · ICSEA 998 · 2.5 km away
Sunbury Primary School
Sunbury · Government primary · Prep-6
400 students · ICSEA 1056 · 2.5 km away
Our Lady of Mount Carmel School
Sunbury · Catholic primary · Prep-6
299 students · ICSEA 1061 · 2.8 km away
Kismet Park Primary School
Sunbury · Government primary · Prep-6
358 students · ICSEA 1023 · 2.9 km away
Similar schools
Catholic primary schools in VIC with a comparable ICSEA.
St Brigid's School
Gisborne · Catholic primary · Prep-6
216 students · ICSEA 1065
Sacred Heart School
Croydon · Catholic primary · Prep-6
454 students · ICSEA 1065
Christ Our Holy Redeemer School
Oakleigh East · Catholic primary · Prep-6
135 students · ICSEA 1065
Resurrection School
Keysborough · Catholic primary · Prep-6
415 students · ICSEA 1065
Trinity Catholic School
Richmond · Catholic primary · Prep-6
213 students · ICSEA 1065
Mary Queen of Heaven Catholic Primary School
Greenvale · Catholic primary · Prep-6
236 students · ICSEA 1065
Frequently asked questions
Is Holy Trinity Catholic Primary School a public or private school?
Holy Trinity Catholic Primary School is a Catholic school, which makes it a non-government (private) school affiliated with Victorian Catholic Education Authority.
What year levels does Holy Trinity Catholic Primary School offer?
Holy Trinity Catholic Primary School offers Prep to 6. It is classified by ACARA as a primary school.
How many students attend Holy Trinity Catholic Primary School?
In 2025, Holy Trinity Catholic Primary School had 431 enrolled students (214 girls, 217 boys), a change of 215% over five years.
What is the ICSEA of Holy Trinity Catholic Primary School?
Holy Trinity Catholic Primary School has an ICSEA (Index of Community Socio-Educational Advantage) of 1065. The national average is 1000, so this indicates above-average socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does Holy Trinity Catholic Primary School rank in VIC?
Holy Trinity Catholic Primary School ranks 348th of 1,290 primary schools in Victoria on the Success Index (72.2/100), and 808th of 4,908 nationally.
What is the student-to-teacher ratio at Holy Trinity Catholic Primary School?
Holy Trinity Catholic Primary School has about 14.6 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How many students start Prep at Holy Trinity Catholic Primary School each year?
In 2025, Holy Trinity Catholic Primary School had 76 students in Prep and 40 in Year 6.
Is Holy Trinity Catholic Primary School co-ed?
Yes. Holy Trinity Catholic Primary School is a co-educational school enrolling both girls and boys.
What other schools are near Holy Trinity Catholic Primary School?
There are 10 other schools within 15 km of Holy Trinity Catholic Primary 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 Holy Trinity Catholic Primary School?
The closest Success Tutoring centre is Success Tutoring Caroline Springs, about 17 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.