School Location Enrolment Founded Denomination Boys/Girls Day/Boarding School Colours Blue Mountains Grammar School Wentworth Falls 600 1918 Anglican Boys & Girls Day Gold & Blue Central Coast Grammar School Erina 1,200 1985 Non-denominational Boys & Girls Day Green, Gold & Blue Chevalier College Bowral 1,200 1946 Roman Catholic Boys & Girls Day Blue & Maroon Oakhill College Castle Hill 1,680 1937 Roman Catholic Boys & Girls Day Maroon & Gold Oxley College Bowral 500 1983 Non-denominational Boys & Girls Day Blue & Gold SCECGS Redlands Cremorne 1,600 1884 Anglican Boys & Girls Day Blue, Red & Gold St Andrew's Cathedral School Sydney 1,100 1885 Anglican Boys & Girls Day Blue & White St Augustine's College Brookvale 1,200 1956 Roman Catholic Boys Day Green, Yellow & Red St Patrick's College Strathfield 1,430 1928 Roman Catholic Boys Day Blue, Black & Gold St Paul's Grammar School Cranebrook 1,350 1983 Independent Boys & Girls Day Blue & Green St Pius X College Chatswood 1,300 1937 Roman Catholic Boys Day Blue & Gold St Spyridon College Maroubra 700 1983 Greek Orthodox Boys & Girls Day Blue & White St Stanislaus' College Bathurst 790 1867 Roman Catholic Boys Day & Boarding Blue & White