The following includes the current and the Past Masters having served Acacia Lodge, No. 561 A.F. & A.M. of the Grand Lodge of Canada in the Province of Ontario.
| Term | Name | Term | Name |
|---|---|---|---|
| 2023 | Derek Brook | 2022 | Frank Sigouin |
| 2021 | Donald Learning | 2020 | Donald Learning |
| 2019 | Donald Learning | 2018 | Stephen Plummer |
| 2017 | Jeffery Campbell | 2016 | Sam Roberts |
| 2015 | C. M. Statham | 2014 | Christopher Wanna |
| 2013 | Douglas M. Campbell | 2012 | David Gravelle |
| 2011 | Paul Gibbon | 2010 | Robert S. Uhrig! |
| 2009 | Richard C. Morrison | 2008 | C. M. Statham |
| 2007 | Robert S. Uhrig! | 2006 | Mark G. Paine! |
| 2005 | Michael Jenkyns* | 2004 | H.J. Skynner* |
| 2003 | A.J. Earnshaw | 2002 | Barry F. Burchill |
| 2001 | J. Campbell | 2000 | H.J. Skynner* |
| 1999 | Michael Jenkyns* | 1998 | G.A. Fleck |
| 1997 | T.W. Briggs! | 1996 | Barry F. Burchill |
| 1995 | D.A. Williams | 1994 | William T. Gordon |
| 1993 | Michael J. Jackson | 1992 | G.W. Bent! / Bruce B. Quinney |
| 1991 | D.W. Archambault | 1990 | Douglas M. Campbell |
| 1989 | R.W. Price* | 1988 | H.A. MacMillan* |
| 1987 | S.V. Campbell* | 1986 | L.W. Casey |
| 1985 | B.B. Quinney | 1984 | Neil B. Lillico |
| 1983 | M.J. Jackson | 1982 | William T. Gordon |
| 1981 | R.F.E. Kempster* | 1980 | J.A. Statham* |
| 1979 | R. Siwicky | 1978 | D.M. Zwicker! |
| 1977 | W.M. Inglis* | 1976 | G. Williams / J.H. Johnson* |
| 1975 | R.S. Hobson | 1974 | A.V. Williams* |
| 1973 | Albert B.B. Sewell* | 1972 | F. Novak* |
| 1971 | G.E. MacDonald* | 1970 | S.C. Gratto* |
| 1969 | J.A. Statham* | 1968 | W.D. Archambault* |
| 1967 | D. Wood* | 1966 | J.H. Johnson* |
| 1965 | G.E. Halliday* | 1964 | L.H. Harrow* |
| 1963 | W.M. Dicks* | 1962 | G.A. Forde* |
| 1961 | G.A. Fee* | 1960 | A. Peacock* |
| 1959 | C.C. Lillico* | 1958 | W.L. Moffat* |
| 1957 | C.W. Carson* | 1956 | J.J.W. Darwin* |
| 1955 | R.C.A. Thurston* | 1954 | W.J. Taylor* |
| 1953 | R.A. Mason* | 1952 | K. Campbell* |
| 1951 | G. Clarkson* | 1950 | M.M. Thomson* |
| 1949 | J.M. Proudman* | 1948 | G.R. Shouldice* |
| 1947 | E.V. Lackey* | 1946 | R.E. Isbister* |
| 1945 | W.F. Davis* | 1944 | W.C. Hopper* |
| 1943 | Wellington C. Hobbs* | 1942 | P.R. Halpenny* |
| 1941 | H.A. Hyde-Clarke* | 1940 | G.A. Wild* |
| 1939 | J.M.M. Spicer* | 1938 | F.L. Thompson* |
| 1937 | H.A. Hyde-Clarke* | 1936 | C.W. Crockett* |
| 1935 | E.P. Roy* | 1934 | J.W. Arnott* |
| 1933 | S. Grandmaison* | 1932 | C. Vilbert Craig* |
| 1931 | F.J.A. Old* | 1930 | J.W. Gilchrist* |
| 1929 | G.T. Wild* | 1928 | W.M. Joynt* |
| 1927 | P. Miller Hastey* | 1926 | A.P. McLennan* |
| 1925 | G.K. Stewart* | 1924 | W.A. Dier* |
| 1923 | A.H. Holloway* | 1922 | M.N. Cumming* |
| 1921 | D.A. MacEachern* | 1920 | D.A. MacEachern* |
* Died
! Demitted