Thornlie Senior High School

Thornlie Senior High School is an independent public co-educational high day school in the City of Gosnells, located off Ovens Road in the Perth suburb of Thornlie, Western Australia.

The school was established in 1971 and has 1,095 enrolled students as of 11 May 2024 from Year 7 to Year 12, although it has had enrolments as high as 1,200 students. It is located in the Canning educational district.

The school offers a specialist Rugby program. As well as preparing students for university—the school includes a comprehensive vocational education and training pathway for students in years 11 and 12.

In 2013, Prime Minister Julia Gillard held Community Cabinet at the high school. The event was booked out, and a small group of animal rights activists held a peaceful protest outside the event.

Enrolments at the school have been relatively stable at around 1,100 students. However, between 2009 and 2013 student numbers dropped below 1,000 due to changes in enrolment s.