Independent co-ed combined school (K–12) in Dee Why, NSW; 1,481 students.
NAPLAN well above the national average at every tested year level; the result is a B+ overall.
St Luke's Grammar School is also known as SLGS and SLGS Dee Why.
2 HSC Top Achievers — #84 of 240 New South Wales schools.
35.4% of students achieved ATAR ≥ 90 — #13 of 19 New South Wales schools.
St Luke's Grammar School has an overall SchoolRank score of 66.1/100, rated "Good". This score is calculated from academic results, student growth, wellbeing, extracurricular programs, and value for money. Academically, the school scores 73/100, indicating strong performance relative to other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1178, well above the national average of 1,000.
In 2025 NAPLAN testing at St Luke's Grammar School, Year 3 students averaged 451 across the tested NAPLAN domains, well above the national average of 407 for that year level, and Year 5 students averaged 538, well above the national average of 490 for that year level, and Year 7 students averaged 599, well above the national average of 540 for that year level, and Year 9 students averaged 624, well above the national average of 569 for that year level. Relative to national year-level averages, the school's strongest domain is Numeracy. 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 Luke's Grammar School is a large independent combined school with approximately 1,481 students. It offers education for years K-12. As a independent school, enrolment typically involves an application process. Contact the school directly for enrolment criteria, waiting lists, and open day information.
St Luke's Grammar School has approximate annual tuition fees of $23,986. Actual fees may vary by year level, and additional costs for uniforms, camps, and extracurricular activities typically apply. The school's value score is 51/100, which measures academic outcomes relative to the cost of attendance.
St Luke's Grammar School has a student-to-teacher ratio of 12.1:1. This is below the national average of approximately 14:1, meaning students generally receive more individual attention. Support staff make up 27% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 93%, which is strong.
St Luke's Grammar School is located in Dee Why, NSW, classified as a major cities school. With an ICSEA of 1178 (98th percentile), the school community's socio-educational advantage is above average, families tend to have higher education and income levels. ICSEA measures the educational advantage of a school's community, not the school's quality, a lower ICSEA school with strong academic scores may indicate particularly effective teaching.