Boys only Years 7–10 Oakhill College is a fee-paying independent Roman Catholic comprehensive co-educational secondary day school, located in Castle Hill, a suburb in the Hills District of the Greater Western region of Sydney, New South Wales, Australia.

[citation needed] Finally, in the 1990s, the ACU decided to consolidate their campuses in Sydney, and abandoned their Castle Hill facility, which then reverted to the De La Salle brothers.

It has a 25-metre pool, classrooms, cemetery, Chapel, tennis courts, Drama Theatre, green room, agriculture centre, farm, hall, kitchen, canteen, Library, Uniform Shop and a gym.

The main part of the centre is a double basketball court, which is also used for College assemblies and connects to the Benildus Hall.

Oakhill College offers students across various faculties the chance to explore different countries globally, immersing themselves in real-world applications of their curriculum and service.