MacKillop Senior College was opened in 1988. Seventy students commenced Year 11 at St Joseph’s Regional while the first stage was built. This initial group were joined by another seventy students in 1989. A total of sixty-four students completed the College’s first NSW Higher School Certificate in 1989.
The College has been expanded with three building stages. The last stage included the hall, the senior study, visual arts and new classrooms. The original Multi-Purpose Room was converted into the Performing Arts Theatre.
