The 1915–16 NHA season was the seventh season of the National Hockey Association. Five teams played a 24 game schedule. Montreal Canadiens won the league championship and defeated the Portland Rosebuds to win their first ever Stanley Cup.
Toronto Blueshirts included the players from the Toronto Shamrocks/Ontarios/Tecumsehs franchise. Before the season, Ed Livingstone, the Shamrocks owner, purchased the Blueshirts franchise from Frank Robinson. At the annual meeting of November 9, 1915, he was ordered to sell the Shamrocks franchise but could not do so as the Pacific Coast Hockey Association 'raided' the franchise and signed its players.