Government co-educational secondary (Years 7–12) in Sefton, NSW; 1121 students.
NAPLAN averaging +46 above national year-level averages; the result is a B overall.
Sefton High School draws students from the Sefton HS (and 1 more zone).
Sefton High School has an overall SchoolRank score of 63.5/100, rated "Good". This score is calculated from academic results, student growth, wellbeing, extracurricular programs, and value for money. Academically, the school scores 72/100, indicating strong performance relative to other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1033, above the national average of 1,000.
In 2025 NAPLAN testing at Sefton High School, Year 7 students averaged 590 across the tested NAPLAN domains, well above the national average of 540 for that year level, and Year 9 students averaged 611, 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.
Sefton High School is a large government secondary school with approximately 1,121 students. It offers education for years 7-12. As a government school, enrolment is generally available to students living within the school's designated catchment zone. Families outside the zone may apply for out-of-area placement subject to availability. The school also runs an academically selective stream with test-based entry alongside its local intake.
Partially. Sefton High School runs an academically selective stream with test-based entry alongside its regular local intake. Entry is through the Selective High School Placement Test. The main entry point is Year 7. Applications go through the official state process, and entry cutoff marks are not published.
Sefton High School is a government school, so there are no tuition fees. Families may be asked to contribute to voluntary school fees covering materials, excursions, and activities. The school has a value score of 76/100 on SchoolRank, which compares educational outcomes relative to cost, government schools typically score well on this measure.
Sefton High School has a student-to-teacher ratio of 14.8:1. This is around the national average of approximately 14:1, meaning class sizes are typical for Australian schools. Support staff make up 16% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 89%, which is moderate.
The Year 12 completion rate is 96%.
Sefton High School is located in Sefton, NSW, classified as a major cities school. With an ICSEA of 1033 (61th percentile), the school community's socio-educational advantage is around the national average. 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.