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| Year | Champion | Score | Host Site |
|---|---|---|---|
| 1923 | Roberts McLaren Gray (Rosedale GC) | 2up | Lakeview G&CC (Toronto) |
| 1924 | William J. Thompson (Mississauga G&CC) | 7&5 | The Toronto GC (Toronto) |
| 1925 | William J. Thompson (Mississauga G&CC | 4&3 | Summit G&CC (Richmond Hill) |
| 1926 | Donald Day Carrick (Scarboro G&CC) | 3&2 | York Downs G&CC (Toronto) |
| 1927 | Charles R. Somerville (London Hunt) | 1up | Rosedale GC (Toronto) |
| 1928 | Charles R. Somerville (London Hunt) | 2&1 | Lakeview G&CC (Toronto) |
| 1929 | Charles R. Somerville (London Hunt) | 4&3 | London Hunt (London) |
| 1930 | John B. Nash (London Hunt) | 4&3 | Scarboro G&CC (Scarborough) |
| 1931 | Philip Farley (Cedar Brook GC) | 1up | Royal York G&CC (Toronto) |
| 1932 | John Lewis (Brantford G&CC) | 2&1 | Hamilton G&CC (Hamilton) |
| 1933 | Donald Day Carrick (Scarboro G&CC) | 4&3 | Lakeview G&CC (Toronto) |
| 1934 | Philip Farley (Cedar Brook GC) | 3&2 | Essex G&CC (Windsor) |
| 1935 | Fred G. Hoblitzell (Lambton G&CC) | 20th hole | Summit G&CC (Richmond Hill) |
| 1936 | J.G. Adams (Scarboro G&CC) | 2&1 | Mississauga G&CC (Mississauga) |
| 1937 | Charles R. Somerville (London Hunt) | 6&5 | Sunningdale G&CC (London) |
| 1938 | Jim C. Boeckh (York Downs G&CC) | 21st hole | Scarboro G&CC (Scarborough) |
| 1939 | Gordon Taylor Jr. (Summit G&CC) | 4&3 | Cataraqui G&CC (Kingston) |
| 1940 | Philip Farley (Scarboro G&CC) | 2&1 | Summit G&CC (Richmond Hill) |
| 1941 | Bruce Bradley (Oshawa GC) | 1up | Mississauga G&CC (Mississauga) |
| 1942 | John B. Nash (London Hunt) | 1up | Brantford G&CC (Brantford) |
| 1943 | Philip Farley (Scarboro G&CC) | 75-77-152 | Royal York G&CC (Toronto) |
| 1944 | Nick Wisnock* (Burlington G&CC) | 149 | Royal York G&CC (Toronto) |
| 1945 | Philip Farley (Scarboro G&CC) | 69-73-142 | Royal York G&CC (Toronto) |
| 1946 | John B. Nash (London Hunt) | won by default | London Hunt (London) |
| 1947 | Rudy Horvath (Lakewood GC) | 2up | Thornhill CC (Thronhill) |
| 1948 | Philip Farley (Scarboro G&CC) | 4&3 | Rosedale GC (Toronto) |
| 1949 | Gerry Kesselring (Rockway GC) | 38th hole | Westmount G&CC (Kitchener) |
| 1950 | Nick Weslock (Essex G&CC) | 4&2 | The Toronto GC (Toronto) |
| 1951 | Gerry Kesselring (Rockway GC) | 1up | London Hunt (London) |
| 1952 | Gerry Kesselring (Rockway GC) | 13&12 | Cataraqui G&CC (Kingston) |
| 1953 | Gerry Kesselring (Rockway GC) | 4&3 | Brantford G&CC (Brantford) |
| 1954 | Grant Shirk (Westmount G&CC) | 4&3 | Thornhill CC (Thornhill) |
| 1955 | Jerry Magee (Lambton G&CC) | 19th hole | Westmount G&CC (Kitchener) |
| 1956 | Jack Lowrey (St. Catharines G&CC) | 5&3 | Oshawa GC (Oshawa) |
| 1957 | Ray Coole (Glendale G&CC) | 1up | Highland G&CC (London) |
| 1958 | Nick Weslock (Essex G&CC) | 5&4 | Dundas Valley G&CC (Dundas) |
| 1959 | Bob Panasiuk (Roseland G&CC) | 1up | The Toronto GC (Mississauga) |
| 1960 | Dave Morland (North Bay G&CC) | 3&2 | Sunningdale G&CC (London) |
| 1961 | Nick Weslock (Mississaugua G&CC) | 20th hole | Lambton G&CC (Toronto) |
| 1962 | Nick Weslock (Mississaugua G&CC) | 7&5 | Summit G&CC (Richmond Hill) |
| 1963 | Bill Morland (North Bay G&CC) | 3&1 | Cataraqui G&CC (Kingston) |
| 1964 | Gary Cowan (Westmount G&CC) | 4&3 | Weston G&CC (Toronto) |
| 1965 | Nick Weslock (Mississaugua G&CC) | 1up | Richmond Hill G&CC (Richmond Hill) |
| 1966 | Martin Mason (Whitevale GC) | 4&3 | Summit G&CC (Richmond Hill) |
| 1967 | Bill Campbell (Huntington, WV) | 70-72-74-216 | London Hunt (London) |
| 1968 | Gary Cowan (Westmount G&CC) | 69-72-72-213 | Scarboro G&CC (Scarborough) |
| 1969 | Nick Weslock (Mississaugua G&CC) | 68-73-71-212 | Brampton GC (Brampton) |
| 1970 | Nick Weslock (Mississaugua G&CC) | 66-66-71-208 | Aurora Highlands G&CC (Aurora) |
| 1971 | Gary Cowan (Westmount G&CC) | 68-69-68-205 | Lambton G&CC (Toronto) |
| 1972 | Kelly Roberts (Sunningdale G&CC) | 73-67-72-212 | The Toronto GC (Mississauga) |
| 1973 | Kelly Roberts (Sunningdale G&CC) | 74-72-69-215 | St. Georges G&CC (Toronto) |
| 1974 | Gary Cowan (Westmount G&CC) | 69-72-70-211 | Hamilton G&CC (Ancaster) |
| 1975 | Gary Cowan (Westmount G&CC) | 72-71-70-72-285 | Westmount G&CC (Kitchener) |
| 1976 | James Harrison* (Islington GC) | 77-78-69-68-292 | Cedar Brae G&CC (Scarborough) |
| 1977 | Gary Cowan (Westmount G&CC) | 74-68-72-69-283 | London Hunt (London) |
| 1978 | Gary Cowan (Westmount G&CC) | 72-71-70-72-285 | Weston G&CC (Toronto) |
| 1979 | Paul Davis (Whitevale GC) | 73-71-71-71-286 | Summit G&CC (Richmond Hill) |
| 1980 | Les Westlake (St. Catharines G&CC) | 71-70-67-75-283 | Trafalgar G&CC (Milton) |
| 1981 | Gary Cowan (Westmount G&CC) | 73-73-69-67-282 | Spring Lakes GC (Stouffville) |
| 1982 | Bill Swartz (Brampton GC) | 74-67-76-68-285 | St. Thomas G&CC (St. Thomas) |
| 1983 | Len Foran (St. Thomas G&CC) | 72-74-70-67-283 | Sunningdale G&CC (London) |
| 1984 | Gary Cowan (Westmount G&CC) | 68-68-66-71-273 | The Toronto GC (Mississauga) |
| 1985 | Rick Todd (Whitevale GC) | 70-72-73-68-283 | Barrie CC (Barrie) |
| 1986 | Stu Hamilton (Brampton GC) | 70-70-67-71-277 | Midland G&CC (Midland) |
| 1987 | Steve Hayles (St. Georges G&CC) | 71-71-68-71-281 | Thornhill CC (Thornhill) |
| 1988 | Warren Sye (Weston G&CC) | 75-70-65-66-276 | Board of Trade GC (Woodbridge) |
| 1989 | Mike Pero (Picton GC) | 71-69-72-77-289 | Brantford G&CC (Brantford) |
| 1990 | Mike Weir (Huron Oaks GC) | 76-74-72-68-290 | Mississaugua G&CC (Mississauga) |
| 1991 | Warren Sye (Weston G&CC) | 69-69-62-72-272 | Hamilton G&CC (Ancaster) |
| 1992 | Mike Weir (Huron Oaks GC) | 70-67-71-73-281 | St. Thomas G&CC (St. Thomas) |
| 1993 | Warren Sye* (Weston G&CC) | 74-70-72-75-291 | Aurora Highlands G&CC (Aurora) |
| 1994 | Warren Sye* (Weston G&CC) | 66-67-71-71-275 | Cutten Club (Guelph) |
| 1995 | Bill Hutcheson (West Haven G&CC) | 73-71-67-74-285 | National Pines GC (Barrie) |
| 1996 | Warren Sye (Weston G&CC) | 79-69-69-71-288 | Bay of Quinte CC (Belleville) |
| 1997 | Jon Drewery (Puslinch Lake GC) | 76-68-69-69-282 | Kingsville G&CC (Kingsville) |
| 1998 | Michael Hospodar (Brantford G&CC) | 71-71-70-76-288 | Beacon Hall GC (Aurora) |
| 1999 | Drew Symons (Craigowan G&CC) | 73-67-72-69-281 | St. Catharines G&CC (St. Catharines) |
| 2000 | Calvin Kupeyan (Beach Grove G&CC) | 76-72-73-71-292 | The National GC (Woodbridge) |
| 2001 | Jon Mills (Wooden Sticks GC) | 75-69-75-71-290 | Kings Forest Civic GC (Hamilton) |
| 2002 | Charlie Woo (York Downs G&CC) | 69-73-72-72-286 | York Downs G&CC (Unionville) |
| 2003 | Peter Laws (Trafalgar G&CC) | 70-70-67-72-279 | Mississaugua G&CC (Mississauga) |
| 2004 | Andrew Parr (London Hunt &CC) | 67-68-74-68-277 | Donalda Club (Don Mills) |
| 2005 | Graham Hill (Sarnia G&CC) | 71-68-68-71-278 | Redtail (Port Stanley) |
| 2006 | Andrew Parr (London Hunt &CC) | 72-64-67-67-270 | Oshawa Golf & Curling Club (Oshawa) |
| 2007 | Christopher Ross (Hamilton G&CC) | 64-68-70-74-276 | Sutton Creek G&CC (Essex) |
| 2008 | Dave Bunker (Public Player) | 70-65-72-70-277 | Islington GC (Etobicoke) |
| 2009 | Matt Hill (Sarnia G&CC) | 69-67-69-65-270 | Craigowan G&CC (Woodstock) |
| 2010 | Corey Conners* (Listowel GC) | 73-71-72-65-281 | Idylwylde G&CC (Sudbury) |
| 2011 | Mark Hoffman (Thornhill G&CC) | 68-70-68-69-275 | Brampton GC (Brampton) |
| 2012 | Albin Choi* (Beacon Hall GC) | 67-69-69-71 | The Summit G&CC (Richmond Hill) |
| 2013 | Stephane Dubois (Brantford G&CC) | 67-73-71-71-282 | OslerBrook G&CC (Collingwood) |
| 2014 | Chris Hemmerich (Westmount G&CC) | 72-67-69-63-271 | The Club at North Halton (Georgetown) |
| 2015 | Elliott Whitley (GAO Public Player) | 72-67-66-66-271 | Peterborough G&CC (Peterborough) |
| 2016 | Max Sear (York Downs G&CC) | 69-68-65-71-273 | The Thornhill Club (Thornhill) |
| 2017 | Sudarshan Yellamaraju (Blue Springs GC) | 69-68-69-67-273 | Ambassador GC |
| 2018 | Garrett Rank (Elmira Golf Club) | 66-69-73-74-198 | St. Thomas Golf & CC |
| 2019 | Matthew Anderson Credit Valley G&CC | 70-68-68-72-278 | OslerBrook G&CC |
| 2020 | Cougar Collins (TPC at Osprey Valley) | 74-74-66-72 - 286 | Otter Creek GC |
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