St. Augustine Catholic High School (Ontario)

St. Augustine Catholic High School () is a separate high school in Markham, Ontario, Canada. It is a technologically oriented school, is part of the York Catholic District School Board, and opened in 2001. As of September 2019, it had an enrolment of 1082 students and 80 faculty members. In the Fraser Institute's Report Card on Ontario’s Secondary Schools 2019, the school was ranked 12th out of 739 secondary schools in Ontario with an overall rating of 8.8 out of 10.

Even though St. Augustine CHS has a short history, it has earned itself a distinguished reputation in the York Catholic District School Board as a strong academic school, earning high grades in the grade nine EQAO mathematics and the grade ten OSSLT. Giving many different special programs that set it apart from other high schools in Ontario. Programs like a Specialist High Skills Major (SHSM) Program and the unique STEM + Focused Laptop Program. The St. Augustine CHS STEM+ Focused Laptop Program is an inter-disciplinary approach to inquiry and problem-based learning. It incorporates real-world challenges and the engineering design process to foster critical thinking, creativity, collaboration, and communication skills guided by the traditional principles of Catholic social teachings.