Premierships - A Grade
| 1922 | Mallocks | 1954 | North Fremantle | 1983 | Mt Lawley | 2012 | University |
| 1923 | Commonwealth Bank | 1955 | North Fremantle | 1984 | Wembley | 2013 | Wesley Curtin |
| 1924 | Teachers College | 1956 | East Perth | 1985 | Mt Lawley | 2014 | University |
| 1925 | Teachers College | 1957 | East Perth | 1986 | Mt Lawley | 2015 | University |
| 1926 | Teachers College | 1958 | Wembley | 1987 | Mt Lawley | 2016 | Trinity Aquinas |
| 1927 | Commonwealth Bank | 1959 | Wembley | 1988 | Mt Lawley | 2017 | Trinity Aquinas |
| 1928 | Sandovers | 1960 | North Fremantle | 1989 | North Beach | 2018 | Scarborough |
| 1929 | University | 1961 | University | 1990 | North Beach | 2019 | University |
| 1930 | Postals | 1962 | University | 1991 | Mt Lawley | 2020 | Scarborough |
| 1931 | Postals | 1963 | Wembley | 1992 | Mt Lawley | ||
| 1932 | Postals | 1964 | University | 1993 | North Beach | ||
| 1933 | University | 1965 | University | 1994 | West Coast | ||
| 1934 | University | 1966 | University | 1995 | Scarborough | ||
| 1935 | Sandovers | 1967 | C.B.C | 1996 | University | ||
| 1936 | Sandovers | 1968 | Wembley | 1997 | Scarborough | ||
| 1937 | Sandovers | 1969 | University | 1998 | Scarborough | ||
| 1938 | Wembley | 1970 | University | 1999 | North Beach | ||
| 1939 | Wembley | 1971 | Wembley | 2000 | C.B.C | ||
| 1940 | Wembley | 1972 | Wembley | 2001 | North Beach | ||
| 1941 | North Fremantle | 1973 | Wembley | 2002 | North Beach | ||
| 1942-45 | No Competition | 1974 | Wembley | 2003 | North Fremantle | ||
| 1946 | North Fremantle | 1975 | University | 2004 | North Beach | ||
| 1947 | North Fremantle | 1976 | Wembley | 2005 | North Beach | ||
| 1948 | University | 1977 | University | 2006 | North Beach | ||
| 1949 | North Fremantle | 1978 | Wembley | 2007 | North Beach | ||
| 1950 | Midland Junction | 1979 | Mt Lawley | 2008 | North Beach | ||
| 1951 | Mosman Park | 1980 | Nollamara | 2009 | North Beach | ||
| 1952 | South Perth | 1981 | University | 2010 | North Beach | ||
| 1953 | South Perth | 1982 | Old Scotch | 2011 | University |