St Marys Senior High School

St Marys Senior High School is a government-funded co-educational dual modality partially academically selective and comprehensive post-compulsory secondary day school, located in St Marys, a suburb in western Sydney, New South Wales, Australia.

Established in 1989, the school is the first New South Wales Department of Education senior high school and currently caters for approximately 900 students in Year 11 and Year 12.

History
The school opened in 1989.

In 2008, a St Marys Senior High School student was awarded first place in the Society and Culture HSC exam. In the 2008 HSC exams, St Marys Senior High School had 5 students achieve recognition on the Board of Studies All Rounders List.

In 2022, news broke out about George Danakis, a 44 year old man from Blacktown who was caught on St Marys Senior High School's CCTV to be having sexual intercourse with sheep, cows and goats throughout multiple nights in the school's barn. He was later arrested and is currently serving a potential 2 year and 4 month prison sentence. His charges include break and enter, possession of an unauthorised firearm and three counts of bestiality. He will be eligible for release on September 14th, 2024.

Notable alumni

 * Rebecca Leerace walker and Australian representative to the 2012 Olympics
 * Paige Hadley – netballer
 * Grentperez – Filipino-Australian musician