 The school was founded as Rosary High School in 1946 in Fairfield, while the Sisters of St Joseph, a teaching order founded by Mary MacKillop, have been engaged in the area since 1931.In its current form the College was established in 1991, and was one of the newest schools in the Archdiocese of Sydney.Mary MacKillop Catholic Colleges emphasises community, and each of the school's houses - Arena, Crosio, Goolagong, Henderson, McCormack and O'Shane - are named after women the school sees as worthy role models for the students.