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 Major Junior Hockey League (QMJHL), along with a host team—compete in the MasterCard Memorial Cup Tournament. The OHL's Windsor Spitfires are the defending champions, having won the 2009 Memorial Cup in Rimouski, Quebec and the 2010 tournament in Brandon, Manitoba.

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. 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 the current 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. Sixty teams across the CHL's three member leagues are eligible to compete for the Memorial Cup, representing nine provinces and five American states.

The Western Hockey League has won the title 18 times since the adoption of the three league tournament format in 1972. The Ontario Hockey League has 14 titles, and the Quebec Major Junior Hockey League has 7. The Toronto Marlboros won the most titles with six. Among currently active teams, the Oshawa Generals and Regina Pats lead with four titles each.

1919 to 1971
The Memorial Cup was presented to the Canadian Amateur Hockey Association (CAHA) in 1919 by the Ontario Hockey Association (OHA) in remembrance of the soldiers who died fighting for Canada in World War I. It was to be awarded to the junior hockey champions of Canada in an east versus west format. The eastern Canadian champion, who from 1932 won the George Richardson Memorial Trophy, met the western Canadian champion, winners of the Abbott Cup. The first championship featured the University of Toronto Schools against the Regina Patricias (now the Pats) in a two-game, total-goals series. The University of Toronto won the title easily, defeating Regina by scores of 14–3 and 15–5 to win the series with a total score of 29–8.

The head-to-head competition for the Memorial Cup has changed formats several times. The CAHA moved to a best-of-three format in 1925 as the first team to win two games was declared the champion. In 1938, the series was increased to best-of-five, and to best-of-seven in 1943. There were two exceptions to these formats. The 1949 final between the Montreal Royals and the Brandon Wheat Kings required an eighth game after the third game ended in a tie. The 1971 final between the Quebec Remparts and the Edmonton Oil Kings was nearly canceled outright in the wake of controversy surrounding the inclusion of the previously outlawed Western Canada Hockey League (WCHL) as the western league was allowed to use more over-age players and received a larger travel allowance from the CAHA. The differences were resolved, and an abbreviated best-of-three series was held in Quebec City, Quebec.

While the Memorial Cup was not intended to be a challenge trophy, a team has twice challenged the defending champion for the cup. After the Toronto Canoe Club defeated the Selkirk Fishermen in 1920, they were met with a challenge by the Fort William Beavers for the trophy. Toronto agreed, and easily defeated Fort William 11–1 in a single game playoff. The second challenge occurred a half-century later, in 1970. The WCHL's Flin Flon Bombers challenged the Montreal Junior Canadiens. Considered an outlaw league by the CAHA, WCHL teams were not permitted to participate in the Memorial Cup playoffs. The Junior Canadiens declined the challenge.

''TG = total goals. The team that scored the most goals in two games won the championship. From 1925 onward, the total represents the number of games won.''

1972 to 1982
In 1970, the CAHA divided the Junior A ranks into two levels, creating a Major–Junior tier that consisted of three leagues: the Quebec Major Junior Hockey League (QMJHL), the Ontario Hockey Association (OHA, now the OHL) and the Western Canada Hockey League (WCHL, now WHL). It was decided that the Memorial Cup would be the championship trophy of the Major Junior leagues, while the Manitoba Centennial Trophy was created as the Junior A championship. The CAHA decided that beginning in 1972, the Memorial Cup would be determined via a double round-robin tournament (four games each) between the champion of the three leagues, featuring a single game championship involving the top two finishers in the tournament. The creation of the WHL's Portland Winter Hawks in 1976 opened the competition up to non-Canadian teams for the first time, and in 1982, the Winter Hawks became the first American team in Memorial Cup history to compete for the trophy.

1983 to present
The Memorial Cup tournament was expanded to four teams in 1983; a pre-determined host team was added in place of holding the tournament in a neutral host city. The first such host team was the Portland Winter Hawks, who set numerous firsts in the 1983 tournament. It represented the first time Memorial Cup games were held outside Canada, and by virtue of winning the tournament, the Winter Hawks became the first American team to win the Cup. The Winter Hawks also became the first team in Memorial Cup history to win the championship despite failing to win its own league title—they had been defeated by the Lethbridge Broncos in the WHL playoffs.

The four-team format remains in use, and the host team cycles evenly between all three leagues. In 1987, however, only three teams competed for the Memorial Cup. To determine the host team for that tournament, the OHL held a "super series" between its two regular season division winners before the start of the playoffs. The tournament was won by the Oshawa Generals, who went on to win the OHL championship. As a result, the OHL chose to send only Oshawa to the Memorial Cup. In all other tournaments, if the host team had also won their league title, that league's losing finalist also qualified for the Memorial Cup.

Since the current format was adopted, the Memorial Cup has been won by each league:
 * Western Hockey League (WHL): 16 times
 * Ontario Hockey League (OHL): 11 times
 * Quebec Major Junior Hockey League (QMJHL): 7 times


 * The host team for each tournament is listed in bold.
 * If a team qualified for the tournament as the runner-up of their league's championship series, it is listed in italics.