This is the 2019-20 WOAA Senior AA Hockey League season. This was the league's 30th season at the senior level and the 9th season under this name. The league was previously known as the WOAA Senior Hockey League from 1990 to 2010.
- The Mapleton-Minto 81's are renamed the Minto 81's and move all of their home games to the Palmerston & District Community Centre.
- The Huron East Centenaires are renamed the Seaforth Centenaires
|Saugeen Shores Winterhawks||22||16||6||0||0||101||64||32|
|Milverton Four Wheel Drives||22||5||13||2||2||83||143||14|
|Shallow Lake Crushers||22||2||19||0||1||60||122||5|
The top eight team qualify for the senior AA playoffs. All Senior AA series are best-of-seven. The balance of the teams play in the Senior A playoffs. The AA champion is awarded the Secure Insurance Solutions Trophy.
Senior A Preliminary RoundEdit
- Milverton Four Wheel Drives defeated Shallow Lake Crushers 2 games to none
- Lucknow Lancers defeated Petrolia Squires 2 games to none
Senior A SemifinalsEdit
- Tavistock Royals defeated Lucknow Lancers 4 games to none
- Milverton Four Wheel Drives defeated Elora Rocks 4 games to 2
Senior A FinalEdit
Series suspended prior to beginning
Senior AA QuarterfinalsEdit
- Ripley Wolves defeated Durham Thundercats 4 games to 3
- Minto 81's defeated Shelburne Muskies 4 games to 2
- Tillsonburg Thunder defeated Saugeen Shores Winterhawks 4 games to 2
- Clinton Radars defeated Seaforth Centenaires 4 games to 2
Senior AA SemifinalsEdit
- Ripley Wolves tied with Minto 81's 2 games each
- Clinton Radars lead Tillsonburg Thunder 3 games to 1
Playoffs suspended March 12 due to COVID-19 pandemic