St. Mary's High School

St. Mary’s High School is rooted in the Catholic faith, which serves as the foundation for its teaching, learning, and daily community life. Guided by the motto "Teach me Goodness, Discipline & Knowledge," the school aims to develop students who reflect the image of God and contribute positively to the global society. The school culture is described as family-oriented, fostering strong, long-lasting relationships between students and staff.

The school offers a broad range of academic pathways, including regular education, the International Baccalaureate (IB) program, and Extended French. Students may also participate in the Registered Apprenticeship Program (RAP), which allows them to earn high school credits while working as indentured apprentices in over 50 trades, or pursue personalized career internships to gain work experience credits. The curriculum is designed to prepare students for post-secondary success and life beyond graduation.

The school employs a professional team including teachers, counselors, educational assistants, and administrative staff to support student success. This team works to identify individual student needs and differentiate instruction to help all learners reach their full potential. Additionally, the school maintains a Catholic Community of Caring based on values such as faith, respect, responsibility, and trust.

Registration for the 2025-2026 school year is ongoing, and registration for 2026-2027 opened in February 2026. The school prioritizes the enrollment of Catholic students residing within its designated attendance area, though it welcomes non-Catholic students from outside the area when space and resources permit. Families new to the Calgary Catholic School District (CCSD) or those enrolling in Kindergarten must complete an online registration process.

The school operates on a variety of schedules, including regular, modified, and six-day calendars. The academic year typically includes professional growth days for staff, staggered entry days for students, and various faith-based observances. Specific events, such as graduation rehearsals and addresses, are scheduled throughout the spring semester.

Located at 111-18 Avenue SW in Calgary, the school building was constructed in 1958 and later expanded in 1968. Following significant destruction during the 2013 Calgary floods, the facility was fully restored to provide a modern learning environment. The school maintains a close proximity to St. Mary’s Cathedral, which serves as a site for school-wide Mass celebrations.