Balwyn High School is a state-run high school (years 7–12) in the Melbourne suburb of North Balwyn, in Victoria, Australia. It was established in 1954. As of February 2013, it had 1948 students, making it the fourth largest secondary school in Victoria. The school buildings were rebuilt in 1994 after merging with Greythorn High School. Since 1996 the school has housed international students in their recently formed international student program.