There has been Catholic education in the Diocese of Parramatta since the first catholic school was established in the Parramatta area in 1820. There are 80 Catholic systemic schools in the diocese with a total student population of around 43,000 and a staff population of around 5,000. There are also six non-systemic or congregational (independent) Catholic schools.

St Columba's Catholic College, formerly St Columba's High School, is an independent Roman Catholic co-educational secondary day school, located in the Blue Mountains region, on the border of Winmalee and Springwood, in New South Wales, Australia.