Colac Secondary College
Updated Oct 2026 · ACARA 2025Colac, Victoria 3250 · Colac Otway LGA
#248 of 348 high schools in VIC
#863 of 1,472 nationally
About Colac Secondary College
Colac Secondary College is a public 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 476 students (225 girls and 251 boys).
Colac Secondary College has an ICSEA value of 955, indicating a socio-educational profile close to the national average of 1000. That places it in the 27th percentile of Australian schools. 3% of students come from the top socio-educational quarter and 54% from the bottom quarter.
The school employs 59 teachers (49.6 full-time equivalent) and 30 non-teaching staff, giving a student-to-teacher ratio of about 9.5 to 1. Enrolments have grown by 3% over the past five years.
On the Success Index, Colac Secondary College scores 43.7 out of 100, placing it in the lower 50% of secondary schools nationally and 248th of 348 secondary schools in VIC (2nd 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 955
- Students in the top advantage quarter (15%)3% of students
- Teacher resourcing (students per teacher) (15%)9.5 students per teacher
- Enrolment growth vs local area (5 years) (10%)+3% enrolments since 2020
- ICSEA trend (5 years) (10%)+19 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 Colac Secondary College's 476 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Colac Secondary College have changed over the past decade.
Free academic assessment
Is your child on track at Colac Secondary College?
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Schools near Colac Secondary College
Closest schools by straight-line distance, with their Success Index.
Trinity College Colac
Colac · Catholic high school · 7-12
744 students · ICSEA 1015 · 991 m away
Sacred Heart School
Elliminyt · Catholic primary · Prep-6
398 students · ICSEA 1025 · 1.0 km away
Elliminyt Primary School
Elliminyt · Government primary · Prep-6
229 students · ICSEA 996 · 1.2 km away
Colac Primary School
Colac · Government primary · Prep-6
164 students · ICSEA 946 · 1.7 km away
Colac South West Primary School
Colac · Government primary · Prep-6
129 students · ICSEA 948 · 1.8 km away
Colac West Primary School
Colac · Government primary · Prep-6
62 students · ICSEA 899 · 1.9 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 · 2.7 km away
St Brendan's School
Coragulac · Catholic primary · Prep-6
37 students · ICSEA 977 · 11 km away
Alvie Primary School
Alvie · Government primary · Prep-6
78 students · ICSEA 968 · 14 km away
Similar schools
Government secondary schools in VIC with a comparable ICSEA.
Bairnsdale Secondary College
Bairnsdale · Government high school · 7-12
1,213 students · ICSEA 955
Staughton College
Melton South · Government high school · 7-12
1,705 students · ICSEA 956
Dimboola Memorial Secondary College
Dimboola · Government high school · 7-12
124 students · ICSEA 956
Epping Secondary College
Epping · Government high school · 7-12
975 students · ICSEA 956
Euroa Secondary College
Euroa · Government high school · 7-12
273 students · ICSEA 956
Rutherglen High School
Rutherglen · Government high school · 7-12
306 students · ICSEA 954
Frequently asked questions
Is Colac Secondary College a public or private school?
Colac Secondary College is a public (government) school run by the Victoria education department.
What year levels does Colac Secondary College offer?
Colac Secondary College offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Colac Secondary College?
In 2025, Colac Secondary College had 476 enrolled students (225 girls, 251 boys), a change of 3% over five years.
What is the ICSEA of Colac Secondary College?
Colac Secondary College has an ICSEA (Index of Community Socio-Educational Advantage) of 955. 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 Colac Secondary College rank in VIC?
Colac Secondary College ranks 248th of 348 secondary schools in Victoria on the Success Index (43.7/100), and 863rd of 1,472 nationally.
What is the student-to-teacher ratio at Colac Secondary College?
Colac Secondary College has about 9.5 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
What are the VCE results at Colac Secondary College?
In 2025, Colac Secondary College recorded a median VCE study score of 25 with 2.1% of study scores at 40 or above, from 97 students enrolled in at least one VCE study. Source: VCAA Senior Secondary Completion and Achievement Information.
How big is the Year 7 cohort at Colac Secondary College?
In 2025, Colac Secondary College had 78 students in Year 7 and 51 in Year 12.
Is Colac Secondary College co-ed?
Yes. Colac Secondary College is a co-educational school enrolling both girls and boys.
What other schools are near Colac Secondary College?
There are 10 other schools within 15 km of Colac Secondary College 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 Colac Secondary College?
The closest Success Tutoring centre is Success Tutoring Torquay, about 64 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.