St Aloysius College is a Catholic, day school for girls, situated in Adelaide, South Australia.

St Aloysius College, also known as "SAC", was established by the Sisters of Mercy in 1880,[3] and educates over 1300 students from Reception to Year 12.

The sisters finally left Angas Street in 2005, at which time the school took control of the entire complex of buildings.

In 2008, a grand piano was bought and the St Aloysius Stage Band and vocalists went on a tour of China.

See Duke of Edinburgh Award Upon attending their first day at St Aloysius, each student is assigned a house team.