| Len Hamilton | |
| Constituency Mp1: | Swan |
| Parliament1: | Australian |
| Predecessor1: | Don Mountjoy |
| Successor1: | Bill Grayden |
| Term Start1: | 28 September 1946 |
| Term End1: | 10 December 1949 |
| Constituency Mp2: | Canning |
| Parliament2: | Australian |
| Predecessor2: | New seat |
| Successor2: | Neil McNeill |
| Term Start2: | 10 December 1949 |
| Term End2: | 2 November 1961 |
| Birth Date: | 1899 7, df=yes |
| Birth Place: | Jarrahdale, Western Australia |
| Nationality: | Australian |
| Party: | Australian Country Party |
| Occupation: | Farmer |
Leonard William Hamilton (7 July 1899 – 31 May 1987) was an Australian politician. Born in Jarrahdale, Western Australia, he was educated at Perth Boys School before becoming a wheat and sugar farmer. He served in the military from 1917 to 1920 and from 1940 to 1945. In 1946, he was elected to the Australian House of Representatives as the Country Party member for Swan, defeating Labor MP Don Mountjoy. In 1949, he transferred to the new seat of Canning, where he remained until his retirement in 1961. Hamilton later served as President of the Western Australian branch of the Country Party. He died in 1987.[1]