The 1917 Stanley Cup Finals was contested by the Pacific Coast Hockey Association (PCHA) champion Seattle Metropolitans and the National Hockey Association (NHA) and Stanley Cup defending champion Montreal Canadiens. Seattle defeated Montreal three games to one in a best-of-five game series to become the first team from the United States to win the Cup. The series was also the first Stanley Cup Finals to be played in the United States, and the last Stanley Cup Finals to not feature a National Hockey League team, as the NHA rebranded as the NHL in November 1917.

The Seattle Metropolitans were a professional ice hockey team based in Seattle, Washington, playing in the Pacific Coast Hockey Association (PCHA) from 1915 to 1924. During their nine seasons, the Metropolitans were the PCHA's most successful franchise, as they went 112–96–2 in their nine years as a franchise. The Metropolitans also won the most regular season PCHA championships, winning five times, with Seattle finishing second on three other occasions. The Metropolitans played their home games at the 2,500 seat Seattle Ice Arena located downtown at 5th and University.