A by-election was held for the New South Wales Legislative Assembly electorate of The Tumut on 16 November 1863. The by-election was triggered because of the resignation of Charles Cowper Jr.[1] James Martin had replaced Charles Cowper Sr as Premier, establishing his first ministry,[2] and Cowper Jr. resigned his seat to successfully challenge Martin at the Orange by-election.[3]
| Date | Event | |
|---|---|---|
| 16 October 1863 | James Martin appointed Premier and Attorney-General. | |
| 24 October 1863 | Charles Cowper Jr. resigned his seat. | |
| 27 October 1863 | Writ of election issued by the Speaker of the Legislative Assembly.[4] | |
| 10 November 1863 | Nominations | |
| 16 November 1863 | Polling day | |
| 1 December 1863 | Return of writ |