This is the 2016-17 Allan Cup Hockey Season. This is the league's 7th season under this name and 27th 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 league adopted a 17 player roster for all games which would be enough to form three lines of forwards and defencemen and have two goalies. The pres release stated it will provide first line players with more time on the ice and provide fans with a better game experience.
- The Thorold Athletics are not on the league schedule when it is released on September 1, 2017. It was later announced that the team was taking a one year leave of absence citing player challenges and stated their intent to return for 2018-19. The team's 23 players were dispersed to the other teams in the league in a dispersal draft.
- Due to renovations at the J. L. Grightmire Arena, the Dundas Real McCoys relocate their home games to the Harry Howell Arena in Flamborough, which was their home back in the 1970's when the team was known as the Rockton Real McCoys.
|Brantford Blast||Brantford||2000||Brantford Civic Centre|
|Dundas Real McCoys||Dundas||2000|
|Hamilton Steelhawks||Hamilton||2015||Mountain Arena|
|Stoney Creek Generals||Stoney Creek||2013||Gateway Ice Centre|
|Whitby Dunlops||Whitby||2004||Iroquois Park Sports Centre|
To be added upon completion of the regular season.