St Mary's is a Catholic primary in Williamstown with a pastoral heart and tight-knit community feel.
NAPLAN averaging 31 points above national year-level averages and growth below the national median; the result is a B overall.
St Mary's is a Catholic primary in Williamstown with a pastoral heart and tight-knit community feel. The school offers a structured, traditional approach alongside real strengths in STEM and languages. A standout feature is the breadth of learning beyond the classroom: poetry slams, performing arts, dance, bike education, and wetlands programs give students room to grow creatively and outdoors. Social and emotional support is embedded in school life. This is a school that suits families wanting solid academics paired with strong pastoral care and a genuine sense of belonging.
St Mary's School is also known as SMS Williamstown.
St Mary's School has an overall SchoolRank score of 59.1/100, rated "Average". This score is calculated from academic results, student growth, wellbeing, programs, and value for money. Academically, the school grades B+ (Good) against other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1107 (86th percentile; the national average is 1,000).
In 2025 NAPLAN testing at St Mary's School, Year 3 students averaged 460 across the tested NAPLAN domains, well above the national average of 407 for that year level, and Year 5 students averaged 498, in line with the national average of 490 for that year level. Relative to national year-level averages, the school's strongest domain is Reading. 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 School is a small Catholic primary school with approximately 263 students. It offers education for years Prep-6. As a Catholic school, enrolment typically involves an application process. Contact the school directly for enrolment criteria, waiting lists, and open day information.
St Mary's School has approximate annual tuition fees of $3,181. Actual fees may vary by year level, and additional costs for uniforms, camps, and extracurricular activities typically apply. The school grades B+ (Good) for value for money, which weighs academic results against the cost of attendance.
St Mary's School has a student-to-teacher ratio of 14.5:1. This is around the national average of approximately 14:1, meaning class sizes are typical for Australian schools. Support staff make up 28% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 91%, which is good.
St Mary's School is located in Williamstown, VIC, in a major city. Its ICSEA is 1107 (86th 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.