1920–21 Toronto St. Patricks season

The 1920–21 Toronto St. Patricks season was the Toronto National Hockey League (NHL) franchise's fourth season, second as the St. Patricks. The club won the regular season schedule, but lost in the playoffs and did not play for the Stanley Cup.

Playoffs
The St. Patricks qualified first in the second half and played the Senators for the league championship. The Senators defeated the St. Patricks (5–0 and 2–0) to progress to the Stanley Cup Finals against the Vancouver Millionaires, who they also defeated three games to two.

Transactions

 * December 4, 1920: Loaned Babe Dye to the Hamilton Tigers
 * December 15, 1920: Signed Free Agent Rod Smylie
 * December 16, 1920: Traded Howard Lockhart to the Hamilton Tigers for cash
 * December 24, 1920: Babe Dye returned to Toronto from Hamilton Tigers
 * January 25, 1921: Acquired Sprague Cleghorn from Hamilton Tigers for future considerations
 * March 15, 1921: Released Sprague Cleghorn