The 1915–16 PCHA season was the fifth season of the professional men's ice hockey Pacific Coast Hockey Association league. Season play ran from December 7, 1915, until February 25, 1916. Each team would play 18 games. The Portland Rosebuds club would be PCHA champions. After the season the club would play the Stanley Cup finals series against the Montreal Canadiens, NHA champions. Montreal would win the best-of-five series 3–2 to win the Cup.
The league granted a new franchise to Seattle, the Metropolitans. To stock the team, the team signed Harry Holmes, Frank Foyston, Jack Walker, Cully Wilson of the Toronto NHA team. This caused retaliatory raids and Bert Lindsay, Frank Nighbor, Skinner Poulin and Walter Smaill all were signed to NHA clubs.