List of Memorial Cup champions

The Memorial Cup is a junior ice hockey club championship trophy awarded annually to the Canadian Hockey League (CHL) champion. Each year the champions from three CHL member leagues—the Western Hockey League (WHL), Ontario Hockey League (OHL), and Quebec Maritimes Junior Hockey League (QMJHL), along with a host team—compete in the Memorial Cup tournament. Sixty one teams across the CHL's three member leagues are eligible to compete for the Memorial Cup, representing all ten provinces in Canada and four American states. The OHL's London Knights are the defending champions.

Known originally as the OHA Memorial Cup, it was donated in 1919 by the Ontario Hockey Association in honour of the soldiers who died fighting for Canada in World War I. In 2010, the trophy was rededicated to honour all soldiers who died for Canada in any conflict. From its donation in 1919 until 1971, the Memorial Cup was awarded via a series of playoffs to the junior hockey champion of Canada. The Canadian Amateur Hockey Association moved to a three-team round-robin tournament format in 1972 when it divided Junior A hockey into two tiers, naming the Memorial Cup as the championship of the Major Junior rank. The tournament involved just the respective champions from the three CHL major junior leagues. The tournament expanded to the current four-team format including the host city in 1983.

The Western Hockey League and Ontario Hockey League have each won the title 19 times since the adoption of the three league tournament format in 1972, while the Quebec Maritimes Junior Hockey League has won 14. Since the creation of the Memorial Cup, the Toronto Marlboros have won the most titles with seven. Among currently active teams, the Oshawa Generals lead with five titles, the latest one in 2015.