# Canadian Mathematical Olympiad (CMO)

A national proof-based math competition for top high school students in Canada, serving as a key step toward international math Olympiads.

## Key facts

| Field | Value |
| --- | --- |
| Organization | Canadian Mathematical Society |
| Category | stem |
| Cost | Free |
| Deadline | 2027-03-11 |
| Eligibility | Grades 9–12 |
| Format | In person |
| Location | Check official site |
| Apply | https://cms.math.ca/competitions/cmo/ |

## About this program

The Canadian Mathematical Olympiad (CMO) is a national, proof-based mathematics competition organized by the Canadian Mathematical Society for top high school students in Canada. Held annually, the CMO features challenging problems in areas such as algebra, number theory, combinatorics, and geometry, and is designed to test deep problem-solving ability and mathematical creativity rather than routine calculation.

Participation is by invitation only, typically based on strong performance in earlier contests such as the Canadian Open Mathematics Challenge (COMC) and the Canadian Mathematical Olympiad Qualifying Repêchage. The CMO plays a central role in selecting and training students who may represent Canada at the International Mathematical Olympiad (IMO). Students who participate gain experience with advanced mathematics, develop rigorous proof-writing skills, and strengthen their applications for competitive university programs in math, science, and engineering.

## Frequently asked questions

### How much does Canadian Mathematical Olympiad (CMO) cost?

Canadian Mathematical Olympiad (CMO) is completely free — there is no participation fee. Costs like travel or optional materials may still apply; check the official site for details.

### What is the application deadline for Canadian Mathematical Olympiad (CMO)?

The application deadline is March 11, 2027. Always confirm on the program's official site, as dates can shift between cycles.

### Who is eligible for Canadian Mathematical Olympiad (CMO)?

Canadian Mathematical Olympiad (CMO) is open to high school students in grades 9–12. Some programs have additional requirements (GPA, coursework, essays, or recommendations) — the full criteria are on the official site.

### Is Canadian Mathematical Olympiad (CMO) online or in person?

Canadian Mathematical Olympiad (CMO) is an in-person program.

### How do I apply to Canadian Mathematical Olympiad (CMO)?

Apply directly through Canadian Mathematical Society's official website. ExtracurricularHub links to the official application — we list and verify programs but don't process applications.

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Last updated: 2026-07-04.
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