Aquinas College, locally abbreviated as Aquinas, is an independent Roman Catholic single-sex primary and secondary day and boarding school for boys, located at Salter Point, a suburb of Perth, Western Australia.

Christian Brothers College (CBC), informally known as CBC Perth or The Terrace was an Independent school for boys situated on St Georges Terrace in the centre of Perth, Western Australia. The college opened in January 1894, and the college was a founding member of the Public Schools Association in 1905. The college was the second high school (1894) and the second boarding school (1896) in Western Australia. In 1938 boarders and some day students at CBC moved to the new Aquinas College campus at Salter Point. Brother C.P. Foley, who was the headmaster of CBC Perth and who at the same was the first headmaster of Aquinas took with him the Christian Brothers College crest and colours, honour boards, and Public Schools Association membership. Brother Foley insisted the heritage of CBC Perth from 1894–1937 belonged to Aquinas. To further enhance Aquinas as the premier the Christian Brothers College, the main building at Aquinas was designed in the Federation Arts and Crafts architecture of CBC Perth. Meanwhile, although most of the day students remained at CBC Perth, numbers were depleted and the college immediately accepted an overflow of students from St Patrick's Boys School on Wellington Street. CBC Perth continued as a day school from 1938–1961. In 1962, the students and staff of CBC Perth moved to a new site on the East Perth foreshore and the college was renamed Trinity College.