Changes For 2012-13
- Huntsville Otters have ceased operations, jumped down to Georgian Mid-Ontario Junior C Hockey League.
- Brampton Capitals have ceased operations.
- Vaughan Vipers have ceased operations.
- Peterborough Stars have ceased operations and merge with Lindsay Muskies.
- Markham Waxers suspend operations for 2012-13 season.
Read more about this topic: Ontario Provincial Junior A Hockey League