Underdale High School
Updated Oct 2026 · ACARA 2025Underdale, South Australia 5032 · West Torrens LGA
About Underdale High School
Underdale High School is a public high school located in Underdale, South Australia (5032), within the West Torrens local government area. It caters for students from 7 to 12 and in 2025 enrolled 629 students (274 girls and 355 boys).
Underdale High School has an ICSEA value of 1000, indicating a socio-educational profile close to the national average of 1000. That places it in the 47th percentile of Australian schools. 11% of students come from the top socio-educational quarter and 36% from the bottom quarter.
The school employs 49 teachers (47.5 full-time equivalent) and 29 non-teaching staff, giving a student-to-teacher ratio of about 13.2 to 1. Enrolments have grown by 15% over the past five years.
On the Success Index, Underdale High School scores 46.2 out of 100, placing it in the lower 50% of secondary schools nationally and 40th of 84 secondary schools in SA (3rd of 4 in the West Torrens area).
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 1000
- Students in the top advantage quarter (15%)11% of students
- Teacher resourcing (students per teacher) (15%)13.2 students per teacher
- Enrolment growth vs local area (5 years) (10%)+15% enrolments since 2020 (area median +18%)
- ICSEA trend (5 years) (10%)+7 ICSEA points since 2020
The Success Index summarises the academic environment of a school community using official ACARA data. It is not a measure of teaching quality or student results. Read the methodology.
Student profile
Distribution of students across socio-educational advantage (SEA) quarters, plus community characteristics.
Enrolments by year level
How Underdale High School's 629 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Underdale High School have changed over the past decade.
Free academic assessment
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Schools near Underdale High School
Closest schools by straight-line distance, with their Success Index.
Lockleys North Primary School
Lockleys · Government primary · R-6
422 students · ICSEA 1069 · 621 m away
Nazareth Catholic College
Flinders Park · Catholic combined · R-12
2,576 students · ICSEA 1049 · 830 m away
Flinders Park Primary School
Flinders Park · Government primary · U, R-6
187 students · ICSEA 1037 · 1.0 km away
Torrensville Primary School
Torrensville · Government primary · U, R-6
380 students · ICSEA 1099 · 1.1 km away
St John Bosco School
Brooklyn Park · Catholic primary · R-6
252 students · ICSEA 1054 · 1.3 km away
Our Lady of La Vang School
Flinders Park · Catholic special · U
70 students · ICSEA 1066 · 1.4 km away
Brooklyn Park Primary School
Brooklyn Park · Government primary · U, R-6
118 students · ICSEA 1066 · 1.5 km away
Thebarton Senior College
Torrensville · Government high school · U, 11-12
1,284 students · ICSEA 951 · 1.7 km away
St Francis School
Lockleys · Catholic primary · R-6
457 students · ICSEA 1075 · 1.8 km away
Kidman Park Primary School
Kidman Park · Government primary · U, R-6
485 students · ICSEA 1053 · 2.0 km away
Similar schools
Government secondary schools in SA with a comparable ICSEA.
Seaton High School
Seaton · Government high school · U, 7-12
917 students · ICSEA 1001
Birdwood High School
Birdwood · Government high school · 7-12
555 students · ICSEA 996
Modbury High School
Modbury · Government high school · U, 7-12
926 students · ICSEA 1005
Clare High School
Clare · Government high school · U, 7-12
428 students · ICSEA 994
Hamilton Secondary College
Mitchell Park · Government high school · U, 7-12
609 students · ICSEA 994
Willunga High School
Willunga · Government high school · U, 7-12
693 students · ICSEA 994
Frequently asked questions
Is Underdale High School a public or private school?
Underdale High School is a public (government) school run by the South Australia education department.
What year levels does Underdale High School offer?
Underdale High School offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Underdale High School?
In 2025, Underdale High School had 629 enrolled students (274 girls, 355 boys), a change of 15% over five years.
What is the ICSEA of Underdale High School?
Underdale High School has an ICSEA (Index of Community Socio-Educational Advantage) of 1000. The national average is 1000, so this indicates a socio-educational profile close to the national average of 1000. ICSEA reflects the school community, not teaching quality.
How does Underdale High School rank in SA?
Underdale High School ranks 40th of 84 secondary schools in South Australia on the Success Index (46.2/100), and 819th of 1,472 nationally.
What is the student-to-teacher ratio at Underdale High School?
Underdale High School has about 13.2 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Underdale High School?
In 2025, Underdale High School had 68 students in Year 7 and 116 in Year 12.
Is Underdale High School co-ed?
Yes. Underdale High School is a co-educational school enrolling both girls and boys.
What other schools are near Underdale High School?
There are 10 other schools within 15 km of Underdale High School in our database. Scroll up to the "Nearby schools" section to compare them by Success Index, ICSEA and enrolments, or use the Compare tool.
Where can I get tutoring near Underdale High School?
The closest Success Tutoring centre is Success Tutoring Windsor Gardens, about 11 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.