The 1988–89 QMJHL season was the 20th season in the history of the Quebec Major Junior Hockey League. The QMJHL first awards the end-of-season honours of the "Rookie All-star team" to first year players. The Quebec Remparts franchise returned as Longueuil Collège Français, bringing the league up to eleven teams. The league dissolved its divisions, and each team played 70 games each in the schedule. The league made it mandatory for all the teams' players to wear a full face shield covering their entire face. On February 9, 1989, the Drummondville Voltigeurs' coach and general manager Jean Bégin was suspended indefinitely after he was arrested and charged with sexual assault. The Trois-Rivières Draveurs finished first overall in the regular season, winning their third Jean Rougeau Trophy. The Laval Titan won their first President's Cup since changing the name from the Laval Voisins, by defeating the Victoriaville Tigres in the finals.

Team changes

Final standings

Note: GP = Games played; W = Wins; L = Losses; T = Ties; Pts = Points; GF = Goals for; GA = Goals against

Scoring leaders

Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalties in Minutes

Playoffs

Yves Racine was the leading scorer of the playoffs with 33 points (3 goals, 30 assists).

All-star teams

Trophies and awards