| Year | Winner | Runner-Up | Year | Winner | Runner-Up |
| 1949 | Goldfields | | 1981 | Bunbury | |
| 1950 | Goldfields | | 1982 | Bunbury | |
| 1951 | Donnybrook - Collie | Goldfields | 1983 | Bunbury | |
| 1952 | Donnybrook-Collie | Goldfields | 1984 | Bunbury | Harvey - Murray |
| 1953 | Donnybrook-Collie | Goldfields | 1985 | Narrogin-Pingelly-Williams | Mt Barker |
| 1954 | Goldfields | Beverley-Brookton | 1986 | Geraldton | Collie - Donnybrook |
| 1955 | Merredin - North Eastern Districts | Morawa-Mullawa | 1987 | Pingelly - Williams | Bruce Rock - Narembeen |
| 1956 | Eastern Goldfields | Manjimup-Bridgetown | 1988 | Bunbury | Pingelly - Williams |
| 1957 | Eastern Goldfields | Albany | 1989 | Bunbury | Rockingham - Mandurah |
| 1958 | Eastern Goldfields | Northam - Beverley - York | 1990 | Bunbury | Bruce Rock - Narembeen |
| 1959 | Donnybrook - Collie | Eastern Goldfields | 1991 | Rockingham - Mandurah | Busselton - Margaret River |
| 1960 | Morawa-Mullawa | Merredin - North Eastern Districts | 1992 | Eastern Goldfields | Central Great Southern |
| 1961 | Donnybrook - Collie | Merredin - North Eastern Districts | 1993 | Bruce Rock - Narembeen | Pingelly - Williams |
| 1962 | Eastern Goldfields | Busselton-Margaret River | 1994 | Peel | Bunbury |
| 1963 | Eastern Goldfields | Busselton-Margaret River | 1995 | Eastern Goldfields | Northam |
| 1964 | Eastern Goldfields | Merredin - North Eastern Districts | 1996 | Bunbury | Peel |
| 1965 | Collie - Donnybrook | Albany and Districts | 1997 | Geraldton | Bunbury |
| 1966 | Narrogin-Williams-Wickepin-Pingelly | Northam-Beverley-York | 1998 | Albany | Eastern Goldfields |
| 1967 | Collie - Donnybrook | Northam-Beverley-York | 1999 | Eastern Goldfields | Williams |
| 1968 | Moore Cricket Council | Albany | 2000 | Geraldton | Eastern Goldfields |
| 1969 | Albany | Geraldton | 2001 | Williams | Bunbury |
| 1970 | Narrogin-Williams-Wickepin-Pingelly | Bunbury | 2002 | Bunbury | |
| 1971 | Collie - Donnybrook | Eastern Goldfields | 2003 | Bunbury | |
| 1972 | Narrogin | Collie - Donnybrook | 2004 | Bunbury | |
| 1973 | Hills | Moore Cricket Council | 2005 | Geraldton | |
| 1974 | Eastern Goldfields | Hills | 2006 | Bunbury | |
| 1975 | Narrogin | Mt Barker | 2007 | Bunbury | |
| 1976 | Narrogin District | Albany | 2008 | Busselton - Margaret River | |
| 1977 | Hills | Narrogin District | 2009 | Busselton - Margaret River | |
| 1978 | Mt Barker | Eastern Goldfields | 2010 | Albany | |
| 1979 | Busselton - Margaret River | Geraldton | 2011 | Bunbury | |
| 1980 | Geraldton | Collie - Donnybrook | 2012 | Bunbury | |
| | | | 2013 | Busselton - Margaret River | |
| | | | 2014 | Albany | |
| | | | 2015 | Busselton - Margaret River | |
| | | | 2016 | Busselton - Margaret River | |
| | | | 2017 | Albany | |
| | | | 2018 | Bunbury | |
| | | | 2019 | Geraldton | |