The 1986 Stanley Cup Finals was the championship series of the National Hockey League's (NHL) 1985–86 season, and the culmination of the 1986 Stanley Cup playoffs. It was contested between the Campbell Conference champion Calgary Flames and the Wales Conference champion Montreal Canadiens. The Canadiens won the best-of-seven series, four games to one, to win their 23rd Stanley Cup, and their 17th in their last 18 Finals appearances dating back to 1956.

The 1986 Stanley Cup playoffs, the playoff tournament of the National Hockey League (NHL) began on April 9, after the conclusion of the 1985–86 NHL season. The playoffs concluded on May 24 with the champion Montreal Canadiens defeating the Calgary Flames 4–1 to win the Stanley Cup, in five games.