Underdale High School is a government secondary college in Adelaide that blends academic rigour with strong vocational pathways and specialist academies.
NAPLAN 28 points below national year-level averages and growth below the national median; the result is a B- overall.
Underdale High School is a government secondary college in Adelaide that blends academic rigour with strong vocational pathways and specialist academies. The Football and Tennis academies serve elite athletes, while a cyber security specialisation and dedicated STEM and Creative Arts facilities support students across different interests. The school welcomes international students and maintains an inclusive learning community with culturally diverse backgrounds. It suits families wanting a co-educational environment where academic challenge meets practical skill development and athletic excellence.
Underdale High School is also known as Underdale HS and UHS Underdale.
Underdale High School draws students from the Underdale High School (and 1 more zone).
Underdale High School has an overall SchoolRank score of 44.5/100, rated "Slightly below average". This score is calculated from academic results, student growth, wellbeing, programs, and value for money. Academically, the school grades B− (Slightly below average) against other Australian schools. The school's ICSEA (Index of Community Socio-Educational Advantage) is 1000 (47th percentile; the national average is 1,000).
In 2025 NAPLAN testing at Underdale High School, Year 7 students averaged 516 across the tested NAPLAN domains, below the national average of 540 for that year level, and Year 9 students averaged 537, below the national average of 569 for that year level. 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.
Underdale High School is a medium-sized government secondary school with approximately 629 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.
Underdale 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 B− (Slightly below average) for value for money, which weighs academic results against the cost of attendance.
Underdale High School has a student-to-teacher ratio of 13.2:1. This is around the national average of approximately 14:1, meaning class sizes are typical for Australian schools. Support staff make up 31% of the workforce, providing additional learning assistance and pastoral care. The student attendance rate is 92%, which is good.
The Year 12 completion rate is 85%.
Underdale High School is located in Underdale, SA, in a major city. Its ICSEA is 1000 (47th 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.