1917–18 PCHA season

The 1917-18 PCHA season was the seventh season of the Pacific Coast Hockey Association. Season play ran from December 28, 1917 until March 8, 1918. The season was reduced to 18 games per team. The Seattle Metropolitans club would be regular-season PCHA champions, but lost the play-off to Vancouver Millionaires. The Millionaires then played in the Stanley Cup finals series against Torontos, NHL champions. Toronto would win the best-of-five series 3-2 to win the Cup.

League business
The Spokane franchise folded and the league operated with three teams again.

The first league championship playoffs between the two top finishers started this year. Previously, playoffs were only held when teams tied for first place. Devised by Frank Patrick as a "second-chance" to increase interest in the league, the idea spread to all North American professional sports.

Final standings
Note: W = Wins, L = Losses, T = Ties, GF= Goals For, GA = Goals Against Teams that qualified for the playoffs are highlighted in bold

Leading scorers
GP = Games Played, G = Goals, A = Assists, Pts = Points

Playoffs
Seattle and Vancouver played off for the PCHA league title. Vancouver defeated Seattle to take the league title.

Vancouver wins two-games-total-goals series 3 goals to 2.

Stanley Cup Finals
See 1918 Stanley Cup Finals

Vancouver travelled to Toronto for the Stanley Cup final. The playing rules alternated between the NHL's six-man and the PCHA's seven-man rules. All games were won by the team whose rules were being played. Vancouver won the PCHA games 6–4 and 8–1 but lost the NHL rule games 5–3, 6–3 and 2–1.