Other hockey leagues in 1915:    
PCHA  ·  MaPHL
NHA Champ.
Stanley Cup
z: best record, c: conference winner, y: division winner, w: wildcard, x: clinched playoff spot

NHA Championship

Most goals scored in 2-game series
DateAwayScoreHomeSeries
3/10 (NHA) Mtl. Wanderers 0-4 Ottawa (NHA) OTT 4-0
3/13 (NHA) Ottawa 0-1 Mtl. Wanderers (NHA) OTT 4-1

Stanley Cup Finals

Best of 5-game series
Champions of the NHA and PCHA competed for the Stanley Cup
DateAwayScoreHomeSeries
3/22 (NHA) Ottawa 2-6 Vancouver (PCHA) VBC 1-0
3/24 (NHA) Ottawa 3-8 Vancouver (PCHA) VBC 2-0
3/26 (NHA) Ottawa 3-12 Vancouver (PCHA) VBC 3-0