St Mary MacKillop College
Updated Oct 2026 · ACARA 2025Isabella Plains, Australian Capital Territory 2905 · Unincorporated ACT LGA
About St Mary MacKillop College
St Mary MacKillop College is a catholic high school located in Isabella Plains, Australian Capital Territory (2905), within the Unincorporated ACT local government area. It caters for students from 7 to 12 and in 2025 enrolled 2,088 students (1,112 girls and 976 boys). The school is affiliated with Catholic Education, Archdiocese of Canberra and Goulburn.
St Mary MacKillop College has an ICSEA value of 1068, indicating above-average socio-educational advantage. That places it in the 75th percentile of Australian schools. 27% of students come from the top socio-educational quarter and 10% from the bottom quarter.
The school employs 186 teachers (150.9 full-time equivalent) and 88 non-teaching staff, giving a student-to-teacher ratio of about 13.8 to 1. Enrolments have grown by 13% over the past five years.
On the Success Index, St Mary MacKillop College scores 67.7 out of 100, placing it in the top 25% of secondary schools nationally and 20th of 27 secondary schools in ACT (20th of 27 in the Unincorporated ACT area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1068
- Students in the top advantage quarter (15%)27% of students
- Teacher resourcing (students per teacher) (15%)13.8 students per teacher
- Enrolment growth vs local area (5 years) (10%)+13% enrolments since 2020 (area median +8%)
- ICSEA trend (5 years) (10%)+9 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 MacKillop College's 2,088 students are spread across year levels in 2025.
Enrolment trend
How enrolments at St Mary MacKillop College have changed over the past decade.
Free academic assessment
Is your child on track at St Mary MacKillop 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 Dickson
Schools near St Mary MacKillop College
Closest schools by straight-line distance, with their Success Index.
Isabella Plains Early Childhood School
Isabella Plains · Government primary · K-2
69 students · ICSEA 1052 · 530 m away
Monash Primary School
Monash · Government primary · K-6
414 students · ICSEA 1063 · 1.2 km away
Bonython Primary School
Bonython · Government primary · K-6
341 students · ICSEA 1034 · 1.2 km away
Covenant Christian School
Gordon · Independent combined · K-10
320 students · ICSEA 1090 · 1.7 km away
Richardson Primary School
Richardson · Government primary · K-6
142 students · ICSEA 952 · 1.9 km away
Trinity Christian School
Wanniassa · Independent combined · K-12
1,073 students · ICSEA 1150 · 1.9 km away
Gowrie Primary School
Gowrie · Government primary · K-6
228 students · ICSEA 1043 · 2.0 km away
Calwell Primary School
Calwell · Government primary · K-6
201 students · ICSEA 1010 · 2.1 km away
Erindale College
Wanniassa · Government high school · 10-12
871 students · ICSEA 1041 · 2.5 km away
Lake Tuggeranong College
Greenway · Government high school · 11-12
620 students · ICSEA 1023 · 2.6 km away
Similar schools
Catholic secondary schools in ACT with a comparable ICSEA.
St Francis Xavier College
Florey · Catholic high school · 7-12
1,323 students · ICSEA 1070
St Clare's College
Griffith · Catholic high school · 7-12
887 students · ICSEA 1087
St John Paul II College
Nicholls · Catholic high school · 7-12
880 students · ICSEA 1089
Merici College
Braddon · Catholic high school · 7-12
992 students · ICSEA 1138
Frequently asked questions
Is St Mary MacKillop College a public or private school?
St Mary MacKillop College is a Catholic school, which makes it a non-government (private) school affiliated with Catholic Education, Archdiocese of Canberra and Goulburn.
What year levels does St Mary MacKillop College offer?
St Mary MacKillop College offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend St Mary MacKillop College?
In 2025, St Mary MacKillop College had 2,088 enrolled students (1,112 girls, 976 boys), a change of 13% over five years.
What is the ICSEA of St Mary MacKillop College?
St Mary MacKillop College has an ICSEA (Index of Community Socio-Educational Advantage) of 1068. The national average is 1000, so this indicates above-average socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does St Mary MacKillop College rank in ACT?
St Mary MacKillop College ranks 20th of 27 secondary schools in Australian Capital Territory on the Success Index (67.7/100), and 338th of 1,472 nationally.
What is the student-to-teacher ratio at St Mary MacKillop College?
St Mary MacKillop College has about 13.8 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at St Mary MacKillop College?
In 2025, St Mary MacKillop College had 359 students in Year 7 and 306 in Year 12.
Is St Mary MacKillop College co-ed?
Yes. St Mary MacKillop College is a co-educational school enrolling both girls and boys.
What other schools are near St Mary MacKillop College?
There are 10 other schools within 15 km of St Mary MacKillop 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 St Mary MacKillop College?
The closest Success Tutoring centre is Success Tutoring Dickson, about 20 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.