St Marys Senior High School
Secondary school in St Marys, NSW
About St Marys Senior High School
St Marys Senior High School is a government secondary school located in St Marys, Sydney's North Shore. As a NSW public school, it provides quality education to the local community, catering to students from 11-12.
With 926 students enrolled in 2025 and an ICSEA score of 1052 (69th percentile), the school serves a community with above-average socio-educational advantage. The student-to-teacher ratio of 14:1 supports quality learning outcomes.
Contact & Location
- Location St Marys, NSW 2760
- Website stmaryssen-h.schools.nsw.gov.au
- MySchool View Profile
School Details
- Type Government
- Level Secondary (11-12)
- Gender Co-educational
- Students (2025) 926 enrolled
- Teaching Staff 66 (67.6 FTE)
- Non-Teaching Staff 15 (13 FTE)
- ICSEAIndex of Community Socio-Educational Advantage – measures the socio-educational background of students. Based on parents' occupation, education, and school location. National average is 1000. 1052 (69th percentile)
- Indigenous Students 2%
Student Demographics
Gender
Boys: 362 (39%)
Girls: 564 (61%)
Language Background
LBOTE: 73%Language Background Other Than English – students who speak a language other than English at home.
English only: 27%
ICSEA DistributionIndex of Community Socio-Educational Advantage – shows the distribution of students across socio-educational quarters. Based on parents' occupation, education, and school location. National average is 1000.
Bottom 17%
Lower 27%
Upper 34%
Top 22%