There are a number of debate tournaments that are organized by OSDU on behalf of its members. OSDU is also a member of a national body – Canadian Student Debate Federation – that sponsors other events. The OSDU tournaments held each year are:
- Ontario BP Championships
- Fall term event (usually October)
- This acts as a qualifying tournament for the Canadian National BP Championships
- Regional Debate Tournaments
- Fall term event (dates vary by region)
- Organized by regions / regional coordinators
- Qualifying tournament for the Senior Provincial Championships.
- Ontario Senior Provincial Championships (CNDF Format)
- Winter term event (usually in February)
- This acts as the qualifying tournament for the Canadian National Championships
- OSDU Junior Provincial Debate Championships (CNDF Format)
- Spring Term event (usually in April/May)
- This is the qualifying tournament for the Canadian Junior National Championships.
OSDU also supports – and is supported by – the many University debate clubs that host debate tournaments for high school students. Information for these tournaments will be posted to the event calendar as the information is received.