The 1919–20 PCHA season was the ninth season of the professional men's ice hockey Pacific Coast Hockey Association (PCHA) league. Season play ran from December 26, 1919 until March 10, 1920. The season was enlarged to 22 games per team. The Seattle Metropolitans club would place first during the regular season and then won the play-off with Vancouver Millionaires to take the PCHA championship. The Mets then played in the 1920 Stanley Cup Finals series against Ottawa Senators, National Hockey League (NHL) champions. The Senators won the best-of-five series three games to two.