CBE · Senior High
International Baccalaureate (IB)RegularJohn G. Diefenbaker High School
10-12 · 6620 4 St NW Calgary, AB T2K 1C2
The methodology
The data behind this score
The Roost Rating weights AEAM above PAT, plus Roost field research, capped at 95. A missing source has its weight shared across the ones that remain, never counted as a zero.
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Classes and enrolment
Typical class size
- Grades 10 to 12
- 33Typical for these grades across CBE schools: 31from 168 classes
Each figure is the middle class size in those grades for 2025/26, among the classes whose sizes are published. A class is one teacher with one group of students, so a group with several teachers counts once per teacher, and in junior and senior high each course section counts. The CBE figure is the middle of every CBE school's own figure for those grades, across Alberta's release.
Students enrolled
1,438 students in 2025/26 (preliminary)
Students enrolled each school year, 2016/17 to 2025/26
- 2016/17: 1,387 students
- 2017/18: 1,394 students
- 2018/19: 1,341 students
- 2019/20: 1,452 students
- 2020/21: 1,409 students
- 2021/22: 1,521 students
- 2022/23: 1,672 students
- 2023/24: 1,395 students
- 2024/25: 1,304 students
- 2025/26: 1,438 students
Enrolment moves with boundary changes, new schools nearby, the grades a school offers and how many children live close by. Most schools here had fewer students in 2020/21, the first school year of the pandemic.
Context only: these describe the school's situation, not how well it teaches, and neither is part of the Roost Rating.
Contains information licensed under the Open Government Licence – Alberta. Source: Alberta Education and Childcare.
Class sizes as of Nov 24, 2025Enrolment 2025/26 is preliminary: Alberta replaces it with final figures later.About these figures
Enrolment
How enrolment works
- Grades
- 10-12
- Programs
- International Baccalaureate (IB) · Regular
- Address
- 6620 4 St NW Calgary, AB T2K 1C2
- Neighbourhood
- Huntington Hills (location, not catchment)
CBE schools are assigned by home address. John G. Diefenbaker High School is the designated senior high only if your address falls inside its catchment — confirm yours with an address lookup. Alternative programs are application-based and many run an admission lottery — they are not guaranteed by address. See how and when applications work.
- Classes & supports
- International Student Program
- English Language Learners — Levels 2 through 5
- Work Experience Program
- Honours
“Honours and International Baccalaureate Program”
From the school's own CBE page — care arrangements and class placements change; confirm with the school before you decide.
Register through the Calgary Board of Education.
Where John G. Diefenbaker High School is
6620 4 St NW Calgary, AB T2K 1C2
Your catchment boundary is set by your home address, not the school’s location — look up your address to confirm zoning.
Sources for John G. Diefenbaker High School: Official school page (CBE) · Survey source (SIRR, PDF) · School Development Plan (PDF)
Last updated Jun 2026 · How we score schools