This is the 2019-20 Allan Cup Hockey Season. This is the league's 9th season under this name and 29th season overall. The league was previously known as Major League Hockey from 2004 to 2011, Ontario Senior AAA Hockey League from 2003 to 2004 and Southwestern Senior A Hockey League from 1990 to 2003.
- The owner of the Brantford Blast, Peter Ham announced on July 12, 2018 that the team is for sale and he will not run the team for the 2018-19 season. Ham has owned the team since 2002. It would be announced on September 10, 2018 that the team would not be playing for the 2018-19 season as they were unable to find a new owner. Sale of the team was announced on September 24, 2018. Unfortunately, it would be too late to get the team on the ice for 2018-19. The team will be returning to the ice for 2019-20. The owner of the Stoney Creek Generals will “co-own” both the Generals and the Blast to begin the 2019-20 Allan Cup season. There is hope to add a sixth team for the 2019-20 season to keep the league at an even number of franchises. In Early August it was reported that the Generals franchise would relocate to Brantford and assume the Blast Identity. The Generals had played at least one game in Brantford to start the 2019-20 season.
- The Dundas Real McCoys will return to the J. L. Grightmire Arena (Market St Arena) for the 2019-20 ACH season.
|Brantford Blast||Brantford||2000||Brantford Civic Centre|
|Dundas Real McCoys||Dundas||2000|
|Hamilton Steelhawks||Hamilton||2015||Dave Andreychuk Mountain Arena|
|Whitby Dunlops||Whitby||2004||Iroquois Park Sports Centre|
|Dundas Real McCoys||20||11||6||3||105||88||35|
All four teams advance to the playoffs. The semifinals are best-of-five. Final length to be determined.
- Hamilton Steelhawks defeated Whitby Dunlops 3 games to 1
- Brantford Blast defeated Dundas Real McCoys 3 games to 2