GovernmentSecondaryYears 7-12· Major Cities

J J Cahill Memorial High School

Mascot, NSW 2020 · NSW Department of Education

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ICSEA

987

41th percentile nationally

Around average

Total enrolments

298

Secondary

Student–teacher ratio

8:1

39.3 FTE teachers

Gender mix

43% / 57%

girls / boys

Language background

66%

non-English at home

Socio-educational advantage

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

Bottom: 39%

Lower-mid: 29%

Upper-mid: 23%

Top: 9%

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Other schools in Mascot

St Therese Catholic Primary School

Catholic · Primary

1089

Mascot Public School

Government · Primary

1035

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.