In 1935, the Parish Priest of Our Lady of Dolours Chatswood, Father Barry, asked the Christian Brothers to establish a school to educate the increasing number of local Catholic boys in the area.
St Pius X College started in 1937 as Christian Brothers Chatswood, initially going to the Intermediate level. In 1937, the College opened with 147 students. Today there are over 1100 students.
The College soon established itself as a place of academic excellence. Its first Dux, James Biggs, went on to great success as a Professor of Medicine, thus beginning a tradition of high-achieving students graduating from the College. The first Leaving Certificate class graduated in 1948.
In 1954, whilst under the leadership of Christian Brother Max O’Connor, the College took on its present name in honour of the canonisation of Pope Pius X who had been Supreme Pontiff from 1903 to1914.
The College expanded its curriculum and other activities along with its facilities throughout the 1960s, 70s and 80s. During the 1970s, Mercy College and St Pius X College trialled co-instruction for Years 11 and 12. However, the partnership of two separate schools and administrative systems proved technically too difficult to continue and co-instruction was discontinued in 1983.
In the late 1990s the College undertook extensive renovations and rebuilding to make the academic facilities some of the most effective in NSW. One major improvement was the development of Oxford Falls as an educational complex. Named the Treacy Complex (comprising the Treacy Education Centre-1992 and the Christian Brothers’ Centre-2010), the facility comprises a variety of sports fields (Chaplin Ovals 1 & 2, Walsh Oval and Watkins Oval) and venues as well as a number of meeting places and classrooms.
In 2010, the Christian Brothers appointed the first lay Principal to lead St Pius X College, Chatswood.
In 2012, the College celebrated 75 years of Christian Brothers Education in Chatswood and in 2017 celebrated its 80th Anniversary and Founder’s Day Mass as well as an 80th year musical celebration ‘A Night Full of Stars’