St Mary's Catholic Primary School
Updated Oct 2026 · ACARA 2025Erskineville, New South Wales 2043 · Sydney LGA
#94 of 1,619 primary schools in NSW
#360 of 4,908 nationally
About St Mary's Catholic Primary School
St Mary's Catholic Primary School is a catholic primary school located in Erskineville, New South Wales (2043), within the Sydney local government area. It caters for students from K to 6 and in 2025 enrolled 169 students (87 girls and 82 boys). The school is affiliated with Catholic Schools NSW.
St Mary's Catholic Primary School has an ICSEA value of 1145, indicating very high socio-educational advantage. That places it in the 94th percentile of Australian schools. 60% of students come from the top socio-educational quarter and 3% from the bottom quarter.
The school employs 14 teachers (11.1 full-time equivalent) and 5 non-teaching staff, giving a student-to-teacher ratio of about 15.2 to 1. Enrolments have fallen by 13% over the past five years.
On the Success Index, St Mary's Catholic Primary School scores 77.6 out of 100, placing it in the top 10% of primary schools nationally and 94th of 1,619 primary schools in NSW (7th of 19 in the Sydney area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1145
- Students in the top advantage quarter (15%)60% of students
- Teacher resourcing (students per teacher) (15%)15.2 students per teacher
- Enrolment growth vs local area (5 years) (10%)-13% enrolments since 2020 (area median -14%)
- ICSEA trend (5 years) (10%)-4 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's Catholic Primary School's 169 students are spread across year levels in 2025.
Enrolment trend
How enrolments at St Mary's Catholic Primary School have changed over the past decade.
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Schools near St Mary's Catholic Primary School
Closest schools by straight-line distance, with their Success Index.
Erskineville Public School
Erskineville · Government primary · K-6
334 students · ICSEA 1155 · 159 m away
Central Sydney Intensive English High School
Alexandria · Government high school · 7-11
142 students · ICSEA 1037 · 569 m away
Alexandria Park Community School
Alexandria · Government combined · K-12
1,313 students · ICSEA 1052 · 732 m away
Newtown Public School
Newtown · Government primary · K-6
272 students · ICSEA 1140 · 759 m away
Darlington Public School
Chippendale · Government primary · P-6
147 students · ICSEA 1030 · 856 m away
Newtown High School of Performing Arts
Newtown · Government high school · 7-12
1,145 students · ICSEA 1127 · 860 m away
Newtown North Public School
Newtown · Government primary · K-6
221 students · ICSEA 1132 · 954 m away
Australia Street Infants School
Newtown · Government primary · P-2
104 students · ICSEA 1143 · 1.0 km away
Camdenville Public School
Newtown · Government primary · P-6
310 students · ICSEA 1132 · 1.3 km away
The Athena School
Newtown · Independent combined · K-10
52 students · ICSEA 1058 · 1.3 km away
Similar schools
Catholic primary schools in NSW with a comparable ICSEA.
St Bernadette's Primary School
Castle Hill · Catholic primary · K-6
479 students · ICSEA 1145
Our Lady of Good Counsel Catholic Primary School
Forestville · Catholic primary · K-6
282 students · ICSEA 1145
Our Lady of the Rosary Catholic Primary School
Kensington · Catholic primary · K-6
412 students · ICSEA 1145
Our Lady of Dolours Catholic Primary School
Chatswood · Catholic primary · K-6
355 students · ICSEA 1144
St Agatha's Catholic Primary School
Pennant Hills · Catholic primary · K-6
217 students · ICSEA 1147
St Anthony's Catholic Primary School
Clovelly · Catholic primary · K-6
163 students · ICSEA 1148
Frequently asked questions
Is St Mary's Catholic Primary School a public or private school?
St Mary's Catholic Primary School is a Catholic school, which makes it a non-government (private) school affiliated with Catholic Schools NSW.
What year levels does St Mary's Catholic Primary School offer?
St Mary's Catholic Primary School offers K to 6. It is classified by ACARA as a primary school.
How many students attend St Mary's Catholic Primary School?
In 2025, St Mary's Catholic Primary School had 169 enrolled students (87 girls, 82 boys), a change of -13% over five years.
What is the ICSEA of St Mary's Catholic Primary School?
St Mary's Catholic Primary School has an ICSEA (Index of Community Socio-Educational Advantage) of 1145. The national average is 1000, so this indicates very high socio-educational advantage. ICSEA reflects the school community, not teaching quality.
How does St Mary's Catholic Primary School rank in NSW?
St Mary's Catholic Primary School ranks 94th of 1,619 primary schools in New South Wales on the Success Index (77.6/100), and 360th of 4,908 nationally.
What is the student-to-teacher ratio at St Mary's Catholic Primary School?
St Mary's Catholic Primary School has about 15.2 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How many students start Kindergarten at St Mary's Catholic Primary School each year?
In 2025, St Mary's Catholic Primary School had 28 students in Kindergarten and 25 in Year 6.
Is St Mary's Catholic Primary School co-ed?
Yes. St Mary's Catholic Primary School is a co-educational school enrolling both girls and boys.
What other schools are near St Mary's Catholic Primary School?
There are 10 other schools within 15 km of St Mary's 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 St Mary's Catholic Primary School?
The closest Success Tutoring centre is Success Tutoring Rockdale, about 6.8 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.