St. Francis Xavier Secondary School is a Catholic high school in Mississauga, Ontario, Canada, overseen by the Dufferin-Peel Catholic District School Board. As of October 29, 2021, it has 1,840 students,about 130 teaching and support staff, and a childcare centre. The school mascot is the Tiger. The school has an International Baccalaureate (IB) diploma program and Specialist High Skills Major programs for Hospitality and Health & Wellness.