Catholic
St. Mary's High School
St. Mary's High School is a Calgary school recorded by The City of Calgary as Senior High.
Data updated October 2026.
Location from The City of Calgary open data. Grade range published by the Calgary Catholic School District. Authority: Calgary Catholic School District. Grade ranges, programs and catchment boundaries are set by the school authority and change year to year — I will confirm the current details with the board for any address you are serious about.
Fun fact: The school traces its roots to a school opened in 1885 by the Faithful Companions of Jesus sisters. In 1890 it had 142 students and four teachers.
Ask Kelly to confirm the grades & catchment →
Programs
Overview
Programs offered at St. Mary's High School
Program list published by the Calgary Catholic School District. Programs open and close year to year and some require an application or a lottery — ask me and I will confirm before you buy on the strength of a program.
School details
St. Mary's High School at a glance
- Address
- 111 - 18 Avenue S.W., Calgary
- Board
- Calgary Catholic School District
- Grades
- 10-12 · High school
- Programs
- Regular program (ask the school about specialty programs)
- Phone
- (403) 500-2024
Pin shows the school's location, not its attendance area.
The community
St. Mary's High School is in Mission
This school sits inside the Mission community boundary — that is where to start looking if you want to be close to it.
Nearby
Communities closest to St. Mary's High School
Straight-line distance from the school to each community's centre point. This is proximity, not catchment.
Provincial exam results
How St. Mary's High School performed
Published by Alberta Education. Exam results measure one thing about a school and say nothing about class size, programs, staff or fit — and they are not a reason on their own to buy in a catchment.
Diploma exams — 2025
Grade 12 diploma exam marks, all courses combined and weighted by the number of students writing at this school (1257 exam writers). Ranked #38 of 65 Calgary high schools with 2025 diploma results.
Source: Alberta Education, 2025 provincial testing results (Open Government Licence – Alberta). Figures are this school’s own results weighted across every course written, compared with the same weighted figure for all of Alberta. Schools with very few writers can swing widely year to year.
Questions
St. Mary's High School — common questions
What communities are near St. Mary's High School?
The closest Calgary communities are Beltline (0.6 km), Mission (0.6 km), Cliff Bungalow (0.8 km). Closest is not the same as in-catchment — confirm the boundary with the board.
Is my address in the St. Mary's High School catchment?
Catchment boundaries are set by Calgary Catholic School District, not by community boundaries, and they change year to year. Send me the exact address and I will confirm it with the board before you buy on the strength of a school.
What grades does St. Mary's High School serve?
St. Mary's High School serves grades 10-12, according to the Calgary Catholic School District. Grade ranges and programs such as French immersion can change from year to year — ask me and I will confirm the current range before you buy.
What programs does St. Mary's High School offer?
St. Mary's High School offers International Baccalaureate, Collegiate School Program, according to the Calgary Catholic School District. Programs change year to year and some require an application — confirm with the board.
Can you find me a home near St. Mary's High School?
Yes. Call 403-464-6672 or email contact@kellybaker.realtor and I will set up a search around the school, then confirm the catchment before you write.
Looking for a home near St. Mary's High School?
I will set up a search around the school and confirm the catchment with the board before you write an offer.
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