The regular season, which consisted of 17 teams playing 68 games each, began in September 2011 and ended in March 2012.
The league lost one of his charter teams when the Lewiston Maineiacs folded during after the previous season, the QMJHL later announce an expansion team to Sherbrooke for the 2012–13 season.
In the playoffs, the Saint John Sea Dogs became the seventh team in league history to capture consecutive President's Cup championships.
Note: GP = Games played; W = Wins; L = Losses; OTL = Overtime losses ; SL - Shootout losses ; GF = Goals for ; GA = Goals against; Pts = Points x - team has clinched playoff spot y - team is division leader z - team has clinched division e - team is eliminated from playoff contention Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes Note: GP = Games played; TOI = Total ice time; W = Wins; L = Losses ; GA = Goals against; SO = Total shutouts; SV% = Save percentage; GAA = Goals against average
Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes Note: GP = Games played; Mins = Minutes played; W = Wins; L = Losses; GA = Goals Allowed; SO = Shutouts; SV& = Save percentage; GAA = Goals against average First All-Star Team: