Gladstone High School
Updated Oct 2026 · ACARA 2025Gladstone, South Australia 5473 · Northern Areas LGA
About Gladstone High School
Gladstone High School is a public high school located in Gladstone, South Australia (5473), within the Northern Areas local government area. It caters for students from 7 to 12 and in 2025 enrolled 183 students (85 girls and 98 boys).
Gladstone High School has an ICSEA value of 967, indicating a socio-educational profile close to the national average of 1000. That places it in the 32nd percentile of Australian schools. 5% of students come from the top socio-educational quarter and 43% from the bottom quarter.
The school employs 20 teachers (18.2 full-time equivalent) and 14 non-teaching staff, giving a student-to-teacher ratio of about 10.0 to 1. Enrolments have grown by 39% over the past five years.
On the Success Index, Gladstone High School scores 46.9 out of 100, placing it in the lower 50% of secondary schools nationally and 38th of 84 secondary schools in SA.
Success Index breakdown
Each component is a percentile against schools of the same type across Australia.
- Socio-educational advantage (ICSEA) (50%)ICSEA 967
- Students in the top advantage quarter (15%)5% of students
- Teacher resourcing (students per teacher) (15%)10.0 students per teacher
- Enrolment growth vs local area (5 years) (10%)+39% enrolments since 2020
- ICSEA trend (5 years) (10%)+22 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 Gladstone High School's 183 students are spread across year levels in 2025.
Enrolment trend
How enrolments at Gladstone High School have changed over the past decade.
Free academic assessment
Is your child on track at Gladstone High School?
Rankings tell you about a school community. A free Success Tutoring assessment tells you about your child: exactly where they are in English and Maths, where the gaps are, and a plan to close them. Small-group, Australian-curriculum tutoring with no lock-in contracts.
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Schools near Gladstone High School
Closest schools by straight-line distance, with their Success Index.
Similar schools
Government secondary schools in SA with a comparable ICSEA.
Bordertown High School
Bordertown · Government high school · 7-12
307 students · ICSEA 969
Valley View Secondary School
Para Vista · Government high school · U, 7-12
596 students · ICSEA 963
Roma Mitchell Secondary College
Gepps Cross · Government high school · U, 7-12
1,638 students · ICSEA 971
Seaford Secondary College
Seaford · Government high school · U, 7-12
829 students · ICSEA 962
Kapunda High School
Kapunda · Government high school · 7-12
594 students · ICSEA 972
Waikerie High School
Waikerie · Government high school · 7-12
301 students · ICSEA 962
Frequently asked questions
Is Gladstone High School a public or private school?
Gladstone High School is a public (government) school run by the South Australia education department.
What year levels does Gladstone High School offer?
Gladstone High School offers 7 to 12. It is classified by ACARA as a secondary school.
How many students attend Gladstone High School?
In 2025, Gladstone High School had 183 enrolled students (85 girls, 98 boys), a change of 39% over five years.
What is the ICSEA of Gladstone High School?
Gladstone High School has an ICSEA (Index of Community Socio-Educational Advantage) of 967. 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 Gladstone High School rank in SA?
Gladstone High School ranks 38th of 84 secondary schools in South Australia on the Success Index (46.9/100), and 798th of 1,472 nationally.
What is the student-to-teacher ratio at Gladstone High School?
Gladstone High School has about 10.0 students per full-time-equivalent teacher, based on 2025 ACARA staffing data.
How big is the Year 7 cohort at Gladstone High School?
In 2025, Gladstone High School had 32 students in Year 7 and 18 in Year 12.
Is Gladstone High School co-ed?
Yes. Gladstone High School is a co-educational school enrolling both girls and boys.
What other schools are near Gladstone High School?
There are 3 other schools within 15 km of Gladstone 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 Gladstone High School?
The closest Success Tutoring centre is Success Tutoring Windsor Gardens, about 179 km from the school. Success Tutoring offers a free academic assessment to identify your child's strengths and learning gaps before any sessions begin.