Trinity College Colac
Updated Oct 2026 · ACARA 2025Colac, Victoria 3250 · Colac Otway LGA
About Trinity College Colac
Trinity College Colac is a catholic high school located in Colac, Victoria (3250), within the Colac Otway local government area. It caters for students from 7 to 12 and in 2025 enrolled 744 students (379 girls and 365 boys). The school is affiliated with Victorian Catholic Education Authority.
Trinity College Colac has an ICSEA value of 1015, indicating a socio-educational profile close to the national average of 1000. That places it in the 54th percentile of Australian schools. 11% of students come from the top socio-educational quarter and 29% from the bottom quarter.
The school employs 76 teachers (68.6 full-time equivalent) and 54 non-teaching staff, giving a student-to-teacher ratio of about 10.8 to 1. Enrolments have remained steady over the past five years.
On the Success Index, Trinity College Colac scores 56.9 out of 100, placing it in the top 50% of secondary schools nationally and 172nd of 348 secondary schools in VIC (1st of 2 in the Colac Otway area).
VCE results (2025)
Published by the Victorian Curriculum and Assessment Authority. Study scores range from 0 to 50 with a state mean of 30; a score of 40 or above is in roughly the top 9% statewide.
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1015
- Students in the top advantage quarter (15%)11% of students
- Teacher resourcing (students per teacher) (15%)10.8 students per teacher
- Enrolment growth vs local area (5 years) (10%)+2% enrolments since 2020
- ICSEA trend (5 years) (10%)-2 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 Trinity College Colac's 744 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Trinity College Colac have changed over the past decade.
Free academic assessment
Is your child on track at Trinity College Colac?
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Schools near Trinity College Colac
Closest schools by straight-line distance, with their Success Index.
Sacred Heart School
Elliminyt · Catholic primary · Prep-6
398 students · ICSEA 1025 · 217 m away
Colac Secondary College
Colac · Government high school · 7-12
476 students · ICSEA 955 · 991 m away
Colac South West Primary School
Colac · Government primary · Prep-6
129 students · ICSEA 948 · 1.0 km away
Elliminyt Primary School
Elliminyt · Government primary · Prep-6
229 students · ICSEA 996 · 1.2 km away
Colac West Primary School
Colac · Government primary · Prep-6
62 students · ICSEA 899 · 1.6 km away
St Mary's School
Colac · Catholic primary · Prep-6
266 students · ICSEA 1025 · 1.9 km away
Lake Colac School
Colac · Government special · U
82 students · ICSEA 933 · 2.0 km away
Colac Primary School
Colac · Government primary · Prep-6
164 students · ICSEA 946 · 2.3 km away
St Brendan's School
Coragulac · Catholic primary · Prep-6
37 students · ICSEA 977 · 10 km away
Alvie Primary School
Alvie · Government primary · Prep-6
78 students · ICSEA 968 · 14 km away
Similar schools
Catholic secondary schools in VIC with a comparable ICSEA.
Catholic College Sale
Sale · Catholic high school · 7-12
872 students · ICSEA 1015
Marian College
Ararat · Catholic high school · 7-12
369 students · ICSEA 1017
Nagle College
Bairnsdale · Catholic high school · 7-12
803 students · ICSEA 1018
St Francis Catholic College
Melton West · Catholic high school · 7-12
1,846 students · ICSEA 1012
Marian College
Myrtleford · Catholic high school · 7-12
145 students · ICSEA 1019
Killester College
Springvale · Catholic high school · 7-12
993 students · ICSEA 1020
Frequently asked questions
Is Trinity College Colac a public or private school?
Trinity College Colac is a Catholic school, which makes it a non-government (private) school affiliated with Victorian Catholic Education Authority.
What year levels does Trinity College Colac offer?
Trinity College Colac offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Trinity College Colac?
In 2025, Trinity College Colac had 744 enrolled students (379 girls, 365 boys), a change of 2% over five years.
What is the ICSEA of Trinity College Colac?
Trinity College Colac has an ICSEA (Index of Community Socio-Educational Advantage) of 1015. 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.
How does Trinity College Colac rank in VIC?
Trinity College Colac ranks 172nd of 348 secondary schools in Victoria on the Success Index (56.9/100), and 585th of 1,472 nationally.
What is the student-to-teacher ratio at Trinity College Colac?
Trinity College Colac has about 10.8 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
What are the VCE results at Trinity College Colac?
In 2025, Trinity College Colac recorded a median VCE study score of 28 with 4% of study scores at 40 or above, from 149 students enrolled in at least one VCE study. Source: VCAA Senior Secondary Completion and Achievement Information.
How big is the Year 7 cohort at Trinity College Colac?
In 2025, Trinity College Colac had 154 students in Year 7 and 88 in Year 12.
Is Trinity College Colac co-ed?
Yes. Trinity College Colac is a co-educational school enrolling both girls and boys.
What other schools are near Trinity College Colac?
There are 10 other schools within 15 km of Trinity College Colac 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 Trinity College Colac?
The closest Success Tutoring centre is Success Tutoring Torquay, about 65 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.