St. Francis Xavier Catholic High School, SFX, St. FX is a high school in Ottawa, Ontario, Canada, in the Ottawa Catholic School Board.

The school serves grades 7-12 and opened in 2009.

It joined the National Capital Secondary School Athletic Association for its first season, 2009–10, when it planned to compete in basketball and soccer (senior and junior boys and girls), volleyball (senior girls and junior boys), football (junior boys), golf, hockey (boys and girls), cross-country running, track and field, curling, wrestling, cross-country and Alpine skiing, snowboarding, badminton, and field lacrosse.

[2] Daniel McInnis, class of 2015, patented a hockey helmet and a 3D scanner for bone transplants and prosthetics fabrication and won science fair awards and a scholarship to the University of Toronto.

[3][4][5] Para-athlete Bianca Borgella graduated from St. Francis Xavier in 2021.