The 1915 Stanley Cup Final was played from 1915-03-22 to 1915-03-26. The Pacific Coast Hockey Association (PCHA) champion Vancouver Millionaires swept the National Hockey Association (NHA) champion Ottawa Senators 3 games to 0 in a best-of-five game series. The finals were played in Vancouver, with Games 1, 3, and 5 played under PCHA rules. The Millionaires became the first team from the PCHA to win the Cup.
This was the first Stanley Cup championship finals played under the then-new agreement by the Cup's trustees, the NHA and the PCHA in which the two leagues' respective champions would face each other for the Cup at the end of the season. The Cup trustees accepted the 1915 NHA-PCHA proposal because they became dependent on the professional game; the top amateur teams were now playing for the Allan Cup. Under the new agreement, the Stanley Cup championship finals alternated between the east and the west each year, while the differing rules of the NHA and PCHA alternated each game.
All games of the championship finals were played at Vancouver's Denman Arena, the home of the PCHA champion Millionaires. Vancouver ended up sweeping the series with victories of 6–2, 8–3, and 12–3, scoring 26 total goals while limiting the Senators to just eight overall. Former Senator Cyclone Taylor led the Millionaires with 6 goals. Future Hockey Hall of Famer Barney Stanley scored 5 goals, including 3 in the second period of game three.