The school provides education from kindergarten to Year 12 students and operates under the authority of the Catholic Archbishop of Perth.

Annual sports carnivals include athletics, cross country and swimming.

John XXIII provide many sporting opportunities including rowing, swimming, rugby, athletics, football, basketball, soccer, cross country, volleyball and netball.

Among the school's alumni is Australian swimmer and world record holder Eamon Sullivan.

[9] As with most Australian schools, John XXIII College utilises a house system through which students participate in inter-house activities and competitions.