The 1978–79 Toronto Maple Leafs season was the 62nd season of the Toronto NHL franchise, 52nd as the Maple Leafs.
The Leafs placed third in the Adams Division to make the playoffs where the Leafs won their first round series against the Atlanta Flames, only to lose in the second series to the Montreal Canadiens.
Until 2021, this would mark the last time the Maple Leafs and Canadiens would play each other in the postseason.
Teams that qualified for the playoffs are highlighted in bold.
The Maple Leafs have been involved in the following transactions during the 1978–79 season.