Galston High School is a government-funded co-educational comprehensive secondary day school, located in Galston, a suburb in the Hills District of Sydney, New South Wales, Australia.

[1] Waddell lived in the cottage until 1969, by when the house and orchard were in a bad state of repair.

Because he hadn't paid his taxes, the land was resumed by the government as it was thought to be an ideal location for a high school.

[2] In 1974, the school's buildings opened on the current site and were added to until its final completion in 1982.

In the early hours of 19 May 2014, Galston High School's library caught fire.