Castle Hill High School is a traditional, academically intense government secondary with a strong pastoral culture.
NAPLAN averaging 47 points above national year-level averages; the result is a B+ overall.
Castle Hill High School is a traditional, academically intense government secondary with a strong pastoral culture. It serves high-potential and gifted learners through its Inspire program, alongside comprehensive learning support for additional needs and international students. The school is known for a robust student leadership program and broad subject and activity offerings. Structured and purposeful, it suits families seeking a well-rounded education with clear academic direction and close pastoral attention.
Castle Hill High School is also known as CHHS, Castle Hill HS and CHHS Castle Hill.
6 HSC Top Achievers — #27 of 240 New South Wales schools.
Castle Hill High School draws students from the Castle Hill HS (and 1 more zone).
Castle Hill High School has an overall SchoolRank score of 63.9/100, rated "Good". 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 1121 (89th percentile; the national average is 1,000).
In 2025 NAPLAN testing at Castle Hill High School, Year 7 students averaged 589 across the tested NAPLAN domains, well above the national average of 540 for that year level, and Year 9 students averaged 613, 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.
Castle Hill High School is a large government secondary school with approximately 1,845 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.
Castle Hill 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 grades A− (Excellent) for value for money, which weighs academic results against the cost of attendance.
Castle Hill High School has a student-to-teacher ratio of 14.9:1. This is around the national average of approximately 14:1, meaning class sizes are typical for Australian schools. Support staff make up 14% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 90%, which is good.
In the 2025 HSC, 4 students at Castle Hill High School were all-round achievers, with results in the top band across 10 or more units. The school had 6 top achiever places across 2025 HSC courses. The Year 12 completion rate is 99%.
Castle Hill High School is located in Castle Hill, NSW, in a major city. Its ICSEA is 1121 (89th 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.