IndependentCombinedYears R-12· Major Cities

St John's Grammar School

Belair, SA 5052 · Association of Independent Schools of SA

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ICSEA

1141

94th percentile nationally

Elite (top decile)

Total enrolments

1,009

Combined

Student–teacher ratio

12:1

81.8 FTE teachers

Gender mix

47% / 53%

girls / boys

Language background

10%

non-English at home

Socio-educational advantage

Share of students in each national SEA quarter (bottom = most disadvantaged, top = most advantaged).

Bottom: 3%

Lower-mid: 11%

Upper-mid: 30%

Top: 56%

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Other schools in Belair

Belair Primary School

Government · Primary

1117

Source: ACARA My School 2025. ICSEA reflects the socio-educational background of a school's students — not academic results or teaching quality. National average = 1000. See data sources.