Trinity College
Updated Oct 2026 · ACARA 2025East Perth, Western Australia 6004 · Perth LGA
#22 of 172 combined schools in WA
#235 of 1,259 nationally
About Trinity College
Trinity College is a catholic boys' combined (K–12) school located in East Perth, Western Australia (6004), within the Perth local government area. It caters for students from 4 to 12 and in 2025 enrolled 1,347 students. The school is affiliated with Catholic Education Western Australia.
Trinity College has an ICSEA value of 1113, indicating very high socio-educational advantage. That places it in the 87th percentile of Australian schools. 46% of students come from the top socio-educational quarter and 5% from the bottom quarter.
The school employs 130 teachers (119.1 full-time equivalent) and 127 non-teaching staff, giving a student-to-teacher ratio of about 11.3 to 1. Enrolments have grown by 11% over the past five years.
On the Success Index, Trinity College scores 71.4 out of 100, placing it in the top 25% of combined schools nationally and 22nd of 172 combined schools in WA.
Year 12 ATAR results (2025)
The School Curriculum and Standards Authority lists, for every ATAR course, the schools whose students had combined scores in the top 15% of that course. Trinity College appears for 10 courses.
Courses
Accounting and Finance · Aviation · Business Management and Enterprise · Computer Science · Economics · Mathematics Applications · Mathematics Methods · Mathematics Specialist · Physics · Religion and Life
WA does not publish median ATARs by school; this list is the official per-school measure of top-end achievement. See WA schools with the most top-performing ATAR students.
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1113
- Students in the top advantage quarter (15%)46% of students
- Teacher resourcing (students per teacher) (15%)11.3 students per teacher
- Enrolment growth vs local area (5 years) (10%)+11% 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's 1,347 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Trinity College have changed over the past decade.
Free academic assessment
Is your child on track at Trinity College?
Rankings tell you about a school community. A free Success Tutoring assessment tells you about your child: exactly where they are in English and Maths, where the gaps are, and a plan to close them. Small-group, Australian-curriculum tutoring with no lock-in contracts.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Your nearest centre: Success Tutoring Victoria Park
Schools near Trinity College
Closest schools by straight-line distance, with their Success Index.
Victoria Park Christian School
Victoria Park · Independent primary · PP-6
113 students · ICSEA 1035 · 1.4 km away
Regent College
Victoria Park · Independent primary · PP-6
340 students · ICSEA 1142 · 1.5 km away
Victoria Park Primary School
Victoria Park · Government primary · K-6
510 students · ICSEA 1127 · 1.6 km away
Perth Montessori School
Burswood · Independent combined · PP-12
92 students · ICSEA 1115 · 1.6 km away
Mercedes College
Perth · Independent high school · 7-12
910 students · ICSEA 1122 · 1.6 km away
Ursula Frayne Catholic College
Victoria Park · Catholic combined · PP-12
1,442 students · ICSEA 1108 · 2.1 km away
St Augustine's Primary School
Rivervale · Catholic primary · PP-6
181 students · ICSEA 1114 · 2.2 km away
Kensington Primary School
Kensington · Government primary · K-6
447 students · ICSEA 1121 · 2.4 km away
St George's Anglican Grammar School
Perth · Independent high school · 7-12
596 students · ICSEA 1139 · 2.5 km away
Highgate Primary School
Highgate · Government primary · K-6
943 students · ICSEA 1110 · 2.5 km away
Similar schools
Catholic combined schools in WA with a comparable ICSEA.
Aquinas College
Salter Point · Catholic combined · PP-12
1,332 students · ICSEA 1110
Corpus Christi College
Bateman · Catholic combined · PP-12
1,789 students · ICSEA 1116
Ursula Frayne Catholic College
Victoria Park · Catholic combined · PP-12
1,442 students · ICSEA 1108
Iona Presentation College
Mosman Park · Catholic combined · PP-12
1,265 students · ICSEA 1141
St John Bosco College
Piara Waters · Catholic combined · PP-12
1,243 students · ICSEA 1063
St Mary MacKillop College
Busselton · Catholic combined · PP-12
1,552 students · ICSEA 1052
Frequently asked questions
Is Trinity College a public or private school?
Trinity College is a Catholic school, which makes it a non-government (private) school affiliated with Catholic Education Western Australia.
What year levels does Trinity College offer?
Trinity College offers 4 to 12. It is classified by ACARA as a combined school.
How many students attend Trinity College?
In 2025, Trinity College had 1,347 enrolled students (0 girls, 1,347 boys), a change of 11% over five years.
What is the ICSEA of Trinity College?
Trinity College has an ICSEA (Index of Community Socio-Educational Advantage) of 1113. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does Trinity College rank in WA?
Trinity College ranks 22nd of 172 combined schools in Western Australia on the Success Index (71.4/100), and 235th of 1,259 nationally.
What is the student-to-teacher ratio at Trinity College?
Trinity College has about 11.3 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Trinity College?
In 2025, Trinity College had 192 students in Year 7 and 162 in Year 12.
Is Trinity College co-ed?
No. Trinity College is a boys' school.
What other schools are near Trinity College?
There are 10 other schools within 15 km of Trinity 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 Trinity College?
The closest Success Tutoring centre is Success Tutoring Victoria Park, about 1.6 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.