| Early Groupings (1933–1950) |
| Year | Champion | Finalist | Semifinalist(s) |
|---|
| 1934 | St. Michael's Buzzers (Gr 5) | Preston Riverside (Gr 8) | Hagersville (Gr 10), Peterborough (Gr 2) |
| 1935 | Barrie Colts | St. Michael's Buzzers | Niagara Falls, Peterborough |
| 1936 | St. Michael's Buzzers | Guelph Maple Leafs | Assumption, Kingston |
| 1937 | Northern Vocational | Barrie Colts | Guelph, Niagara Falls |
| 1938 | Kingston Indians (Gr 1) | Barrie Colts (Gr 15) | Brantford (Gr 11), Northern (Gr 5) |
| 1939 | Niagara Falls Good Cheer (Gr 5) | Kitchener Greenshirts (Gr 6) | Oshawa (Gr 2), Runnymede (Gr 3) |
| 1940 | Waterloo Siskins | Owen Sound Greys | Aurora Bears (Gr 5) |
| 1941 | Brantford Lions (Gr 5) | Oshawa Bees (Gr 3) | Owen Sound (Gr 8), St. Catharines (Gr 6) |
| 1942 | Stratford Canadians (Gr 5) | Hamilton Aerovox (Gr 4) | Owen Sound (Gr 7), U of Toronto (Gr 3) |
| 1943 | Port Colborne Recreationists | Milton Tigers (TGr) | U of Toronto (PSG), Windsor |
| 1944 | De La Salle Academy | Barrie Colts | Kingston, Kitchener |
| 1945 | St. Michael's Buzzers (PSG) | Stratford Kroehlers (Gr 9) | Oshawa, Windsor |
| 1946 | De La Salle Academy (Gr 3) | Kitchener Greenshirts (Gr 5) | Scarborough (Gr 2), Waterloo (Gr 6) |
| 1947 | De La Salle Academy (TGr3) | Hamilton Aerovox (Gr 6) | Port Colborne (Gr 8), Toronto (TGr2) |
| 1948 | Hamilton Aerovox (Gr 7) | St. Michael's Buzzers (TGr4) | Upper Canada College (TGr5) |
| 1949 | Kitchener Greenshirts (CGr) | Upper Canada College (PSG) | North Toronto (TGr2), Toronto (TGr1) |
| 1950 | Barrie Colts (GB) | Guelph Biltmores (WGr) | Toronto Carwill Transport (T) |
| Formation of Leagues (1950–1969) |
| Year | Champion | Finalist | Semifinalist(s) |
|---|
| 1951 | Sarnia Jr. Sailors (W) | Weston Dukes (Met) | Kingston (E), Kitchener (WGr) |
| 1952 | Weston Dukes (Met) | Waterloo Siskins (WGr) | Belleville (E), Hamilton (ND) |
| 1953 | Weston Dukes (Met) | Waterloo Siskins (WGr) | Belleville (E), Seaforth (W) |
| 1954 | Waterloo Siskins (WGr) | Weston Dukes (Met) | Kingston Vics (E) |
| 1955 | Woodstock Warriors (C) | Woodbridge Dodgers (Met) | Peterborough (E), Seaforth (W) |
| 1956 | Waterloo Siskins (C) | Brampton Regents (Met) | Kingston Vics (E) |
| 1957 | Dixie Beehives (Met) | Sarnia Legionnaires (W) | Burlington (C), Peterborough (E) |
| 1958 | Sarnia Legionnaires (W) | Lakeshore Bruins (Met) | Burlington (C), Peterborough (E) |
| 1959 | Sarnia Legionnaires (W) | Aurora Bears (Met) | St. Catharines (ND), Waterloo (C) |
| 1960 | Waterloo Siskins (C) | Toronto Marlboros (Met) | Chatham (BC), Peterborough (E) |
| 1961 | St. Michael's Buzzers (Met) | Owen Sound Greys (C) | Peterborough (E), St. Marys |
| 1962 | Waterloo Siskins (C) | St. Thomas Barons (W) | Belleville (E), Chatham (BC) |
| 1963 | St. Marys Lincolns (W) | Kingston Frontenacs (E) | Burlington (ND), Detroit (BC) |
| 1964 | Waterloo Siskins (C) | Weston Dodgers (Met) | Kingston (E), London (W) |
| 1965 | Kitchener Greenshirts (C) | Etobicoke Indians (Met) | Hamilton (ND), London (W) |
| 1966 | Sarnia Legionnaires (W) | Westclair York Steelers (Met) | Hamilton (ND), Oshawa (E) |
| 1967 | Kitchener Greenshirts (C) | Dixie Beehives (Met) | Peterborough (E), Stamford (ND) |
| 1968 | Sarnia Legionnaires (W) | Markham Seal-A-Wax (Met) | Oshawa (E), St. Marys (C) |
| 1969 | Markham Seal-A-Wax (Met) | Strathroy Rockets (C) | Hamilton (ND), Oshawa (E) |
| League Expansion Era (1969–1979) |
| Year | Champion | Finalist | Semi-finalist(s) |
|---|
| 1970 | Dixie Beehives (Met) | Hamilton Mountain Bees (ND) | Kingston (E), Stratford (WO) |
| 1971 | Dixie Beehives (Met) | Hamilton Mountain Bees (ND) | Peterborough (E), Petrolia (BC) |
| 1972 | Markham Waxers (Met) | St. Marys Lincolns (WO) | Peterborough (E), St. Catharines (ND) |
| 1973 | Sarnia Bees (WO) | Toronto Nationals (Met) | Hamilton (ND), Owen Sound (MO) |
| 1974 | Hamilton Red Wings (ND) | Bramalea Blues (Met) | Owen Sound (MO), Sarnia (WO) |
| 1975 | Bramalea Blues (Met) | Oakville Blades (C) | Hamilton (GH), Waterloo (WW) |
| 1976 | St. Marys Lincolns (WO) | Collingwood Blues (MO) | Belleville (Met), Streetsville (C) |
| 1977 | Stratford Cullitons (WW) | Streetsville Derbys (C) | St. Catharines (GH), Seneca (Met) |
| 1978 | Stratford Cullitons (MW) | Streetsville Derbys (C) | Oshawa (Met), Windsor (WO) |
| 1979 | Streetsville Derbys (C) | St. Catharines Falcons (GH) | Oshawa (Met), Windsor (WO) |
| 4- and 5-League Eras (1979–1993) |
| Year | Champion | Finalist | Semifinalist(s) |
|---|
| 1980 | Belleville Bobcats (Met) | Windsor Royals (WO) | Streetsville Derbys (C) |
| 1981 | Burlington Cougars (C) | Stratford Cullitons (MW) | St. Catharines (GH), St. Michael's (Met) |
| 1982 | St. Michael's Buzzers (Met) | Sarnia Bees (WO) | Oakville Blades (C) |
| 1983 | Henry Carr Crusaders (Met) | Stratford Cullitons (MW) | London (WO), Streetsville (C) |
| 1984 | Waterloo Siskins (MW) | Streetsville Derbys (C) | Oshawa Legionaires (Met) |
| 1985 | Waterloo Siskins (MW) | Bramalea Blues (Met) | Barrie Colts (C) |
| 1986 | Stratford Cullitons (MW) | Streetsville Derbys (C) | Pickering (Met), St. Thomas (WO) |
| 1987 | St. Thomas Stars (WO) | Niagara Falls Devils (GH) | Burlington Cougars (C) |
| 1988 | Waterloo Siskins (MW) | Bramalea Blues (Met) | Barrie (C), Niagara Falls (GH) |
| 1989 | St. Michael's Buzzers (Met) | Niagara Falls Devils (GH) | Barrie (C), Sarnia (WO) |
| 1990 | Stratford Cullitons (MW) | St. Catharines Falcons (GH) | Barrie (C), Chatham (WO) |
| 1991 | Waterloo Siskins (MW) | Oakville Blades (C) | Chatham (WO), Welland (GH) |
| 1992 | Kitchener Dutchmen (MW) | Milton Merchants (C) | London (WO), St. Catharines (GH) |
| 1993 | Barrie Colts (C) | Kitchener Dutchmen (MW) | Hamilton (GH), Sarnia (WO) |
| 3-League Era (1993–2007) |
| Year | Champion | Finalist | RR Finalist |
|---|
| 1994 | Waterloo Siskins (MW) | St. Catharines Falcons (GH) | St. Marys Lincolns (WO) |
| 1995 | Stratford Cullitons (MW) | St. Thomas Stars (WO) | Niagara Falls Canucks (GH) |
| 1996 | Niagara Falls Canucks (GH) | St. Thomas Stars (WO) | Stratford Cullitons (MW) |
| 1997 | Elmira Sugar Kings (MW) | St. Catharines Falcons (GH) | Strathroy Rockets (WO) |
| 1998 | Niagara Falls Canucks (GH) | Elmira Sugar Kings (MW) | Chatham Maroons (WO) |
| 1999 | Chatham Maroons (WO) | Stratford Cullitons (MW) | St. Catharines Falcons (GH) |
| 2000 | Cambridge Winterhawks (MW) | St. Catharines Falcons (GH) | Chatham Maroons (WO) |
| 2001 | Elmira Sugar Kings (MW) | Thorold Blackhawks (GH) | Chatham Maroons (WO) |
| 2002 | Sarnia Blast (WO) | Elmira Sugar Kings (MW) | Niagara Falls Canucks (GH) |
| 2003 | Stratford Cullitons (MW) | Thorold Blackhawks (GH) | Petrolia Jets (WO) |
| 2004 | Stratford Cullitons (MW) | Thorold Blackhawks (GH) | Chatham Maroons (WO) |
| 2005 | Thorold Blackhawks (GH) | Chatham Maroons (WO) | Listowel Cyclones (MW) |
| 2006 | Cambridge Winterhawks (MW) | Niagara Falls Canucks (GH) | Chatham Maroons (WO) |
| 2007 | Cambridge Winterhawks (MW) | Strathroy Rockets (WO) | St. Catharines Falcons (GH) |
| Greater Ontario Junior Hockey League (2007–Present) |
| Year | Champion | Finalist | RR Finalist |
|---|
| 2008 | Tecumseh Chiefs (WOC) | Elmira Sugar Kings (MWC) | Thorold Blackhawks (GHC) |
| 2009 | Brantford Eagles (MWC) | Stoney Creek Warriors (GHC) | Sarnia Legionnaires (WOC) |
| 2010 | LaSalle Vipers (WOC) | Brantford Eagles (MWC) | Stoney Creek Warriors (GHC) |
| 2011 | Elmira Sugar Kings (MWC) | Niagara Falls Canucks (GHC) | St. Thomas Stars (WOC) |
| 2012 | St. Catharines Falcons (GHC) | Brantford Eagles (MWC) | London Nationals (WOC) |
| 2013 | London Nationals (WOC) | Cambridge Winter Hawks (MWC) | St. Catharines Falcons (GHC) |
| Year | Champion | Finalist | Semifinalist(s) |
|---|
| 2014 | Caledonia Corvairs (GHC) | St. Catharines Falcons (GHC)* | Leamington (WOC), Waterloo (MWC) |
| 2015 | Caledonia Corvairs (GHC) | LaSalle Vipers (WOC)* | Elmira (MWC), Leamington (WOC) |
| 2016 | Caledonia Corvairs (GHC) | London Nationals (WOC) | Stratford (MWC), Waterloo* (MWC) |
| 2017 | Elmira Sugar Kings* (MWC) | London Nationals (WOC) | Caledonia (GHC), Listowel (MWC) |
| 2018 | Listowel Cyclones (MWC) | Caledonia Corvairs (GHC) | Elmira* (MWC), London (WOC) |
| 2019 | Waterloo Siskins (MWC) | London Nationals (WOC) | Listowel* (MWC), Niagara Falls (GHC) |
| 2020 & 2021 | Cancelled due to COVID-19 outbreak |
| Year | Champion | Finalist | RR Finalist |
|---|
| 2022 | St. Catharines Falcons (GHC) | Chatham Maroons (WOC) | Cambridge Redhawks (MWC) |
| 2023 | Leamington Flyers (WOC) | Stratford Warriors (MWC) | Hamilton Kilty B's (GHC) |
| 2024 | Listowel Cyclones (MWC) | St. Marys Lincolns (WOC) | Fort Erie Meteors (GHC) |
