The 1915 Allan Cup was the Canadian national senior ice hockey championship for the 1914-15 season. The title was first held by the Melville Millionaires as champions of their league and two challenge wins. The Millionaires then lost the final Allan Cup challenge to the Winnipeg Monarchs. The 1915 playoff marked the eighth time the Allan Cup had a champion.
The defending 1914 Allan Cup champions, Regina Victorias, failed to win the Southern Saskatchewan Hockey League. The SSHL champion Melville Millionaires became the Allan Cup champions.
The Melville Millionaires received a challenge from the Prince Albert Mintos, Northern Saskatchewan Hockey League champions. The series was a home-and-home.
Melville Millionaires win the series 15-13 and retain the Allan Cup.
The Melville Millionaires received a challenge from the Toronto Victorias, OHA Senior champions. Played in Melville, Saskatchewan.
Melville Millionaires win the series 15-11 and retain the Allan Cup.
Melville Millionaires received a challenge from the Winnipeg Monarchs, Western Canada champions. Played in Melville, Saskatchewan.