St Aloysius' College (Sydney)

St Aloysius' College is an independent Catholic primary and secondary day school for boys, located in Kirribilli, on the Lower North Shore of Sydney, New South Wales, Australia.

Founded in 1879 by Joseph Dalton SJ at St Kilda House, Woolloomooloo, St Aloysius' is the oldest independent Catholic boys day school in New South Wales. The College is conducted in the Jesuit tradition by the Society of Jesus as part of a worldwide network of schools and universities, which Ignatius of Loyola, the founder of the Order, began in Messina, Sicily, in 1548. The College has an academically selective enrolment policy and as of 2019 catered to approximately 1,251 students from Year 3 to Year 12 (7 to 18 years).

St Aloysius' is affiliated with the Association of Heads of Independent Schools of Australia (AHISA), the Junior School Heads Association of Australia (JSHAA), and is the oldest of the six schools which make up the Combined Associated Schools (CAS).