A by-election was held for the New South Wales Legislative Assembly electorate of West Sydney on 7 July 1865 because of the resignation of John Darvall to return to England.
| Date | Event | |
|---|---|---|
| 22 June 1865 | John Darvall resigned.[1] | |
| 28 June 1865 | Writ of election issued by the Speaker of the Legislative Assembly.[2] | |
| 5 July 1865 | Nominations | |
| 7 July 1865 | Polling day | |
| 12 July 1865 | Return of writ |