| Premiership Season | Team | Number of Teams in Premiership Season | Following Season | Ladder Position | Number of Teams in Following Season |
|---|---|---|---|---|---|
| 1914 | East Fremantle | 8 | 1915 | 5 | 8 |
| 1915 | Subiaco | 8 | 1916 | 7 | 7 |
| 1935 | West Perth | 8 | 1936 | 5 | 8 |
| 1944 | East Perth | 8 | 1945 | 6 | 8 |
| 1960 | West Perth | 8 | 1961 | 5 | 8 |
| 1963 | Swan Districts | 8 | 1964 | 6 | 8 |
| 1969 | West Perth | 8 | 1970 | 6 | 8 |
| 1970 | South Fremantle | 8 | 1971 | 6 | 8 |
| 1974 | East Fremantle | 8 | 1975 | 5 | 8 |
| 1979 | East Fremantle | 8 | 1980 | 7 | 8 |
| 1988 | Subiaco | 8 | 1989 | 6 | 8 |
| 1991 | Claremont | 8 | 1992 | 7 | 8 |
| 1992 | East Fremantle | 8 | 1993 | 6 | 8 |
| 1996 | Claremont | 8 | 1997 | 8 | 9 |
| 1997 | South Fremantle | 9 | 1998 | 6 | 9 |
| 1999 | West Perth | 9 | 2000 | 5 | 9 |
| 2003 | West Perth | 9 | 2004 | 7 | 9 |
| 2009 | South Fremantle | 9 | 2010 | 7 | 9 |
| 2010 | Swan Districts | 9 | 2011 | 8 | 9 |
| 2013 | West Perth | 9 | 2014 | 6 | 9 |
| 2017 | Peel Thunder | 9 | 2018 | 7 | 9 |
| 2019 | Subiaco | 10 | 2020 | 6 | 9 |
| 2021 | Subiaco | 10 | 2022 | 7 | 10 |
| 2022 | West Perth | 10 | 2023 | 6 | 10 |
