This is a list of electoral results for the electoral district of Collie-Preston in Western Australian state elections.
| South-West Mining | ||||
|---|---|---|---|---|
| Member | Party | Term | ||
| John Ewing | Ministerial | 1901–1904 | ||
| Collie | ||||
| Ernest Henshaw | Labor | 1904–1905 | ||
| John Ewing | Ministerial | 1905–1908 | ||
| Arthur Wilson | Labor | 1908–1947 | ||
| Harry May | Labor | 1947–1968 | ||
| Tom Jones | Labor | 1968–1989 | ||
| Dr Hilda Turnbull | National | 1989–2001 | ||
| Mick Murray | Labor | 2001–2005 | ||
| Collie-Wellington | ||||
| Mick Murray | Labor | 2005–2008 | ||
| Collie-Preston | ||||
| Mick Murray | Labor | 2008–2021 | ||
| Jodie Hanns | Labor | 2021–present | ||