St Mary's is an independent girls' school in Karrinyup with strong boarding provision and a distinctive outdoor focus.
NAPLAN well above the national average at every tested year level; the result is an A- overall.
St Mary's is an independent girls' school in Karrinyup with strong boarding provision and a distinctive outdoor focus. The school combines STEM learning with experiential education across two campuses, including a dedicated rural property at Metricup. Diving and surfing programs sit alongside traditional academics, supported by on-site swimming facilities and a Swim School. Pastoral care runs deep through the community, which is tight-knit and values outdoor education as central to formation. The school suits families wanting a girls' education that extends beyond the classroom into water sports, environmental learning, and residential experience.
St Mary's Anglican Girls' School is also known as SMAGS and SMAGS Karrinyup.
St Mary's Anglican Girls' School has an overall SchoolRank score of 73.2/100, rated "Excellent". This score is calculated from academic results, student growth, wellbeing, programs, and value for money. Academically, the school grades A− (Excellent) against other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1151 (95th percentile; the national average is 1,000).
In 2025 NAPLAN testing at St Mary's Anglican Girls' School, Year 3 students averaged 444 across the tested NAPLAN domains, above the national average of 407 for that year level, and Year 5 students averaged 536, well above the national average of 490 for that year level, and Year 7 students averaged 600, well above the national average of 540 for that year level, and Year 9 students averaged 637, well above the national average of 569 for that year level. Relative to national year-level averages, the school's strongest domain is Grammar. National averages are specific to each year level, because NAPLAN scores are scaled so older year levels score higher. A school-wide average can't be compared with a single national figure.
St Mary's Anglican Girls' School is a large Independent combined school with approximately 1,483 students. It offers education for years PP-12. As an Independent school, enrolment typically involves an application process. Contact the school directly for enrolment criteria, waiting lists, and open day information.
St Mary's Anglican Girls' School has approximate annual tuition fees of $26,031. Actual fees may vary by year level, and additional costs for uniforms, camps, and extracurricular activities typically apply. The school grades B (Average) for value for money, which weighs academic results against the cost of attendance.
St Mary's Anglican Girls' School has a student-to-teacher ratio of 9.1:1. This is well below the national average of approximately 14:1, meaning students generally receive more individual attention. Support staff make up 34% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 94%, which is excellent.
St Mary's Anglican Girls' School's official WACE results: Achieved the WACE (2025), 100%. They cover 169 students in full-time, WACE-eligible Year 12.
St Mary's Anglican Girls' School is located in Karrinyup, WA, in a major city. Its ICSEA is 1151 (95th percentile; the national average is 1,000). ICSEA measures the advantage of a school's community, from its parents' education and occupation, not the school's quality. A school with a lower ICSEA and strong academic results may be teaching particularly effectively.