A by-election was held for the New South Wales Legislative Assembly electorate of Mudgee on 16 August 1911 because of the resignation of Labor Party member Bill Dunn because he disagreed with legislation introduced by the Labor Secretary for Lands Niels Nielsen. Labor reversed its policy and Dunn stood for re-election as the Labor candidate.[1]
| Date | Event | |
|---|---|---|
| 26 July 1911 | Bill Dunn resigned. | |
| 26 July 1911 | Writ of election issued by the Speaker of the Legislative Assembly and close of electoral rolls.[2] | |
| 2 August 1911 | Nominations | |
| 16 August 1911 | Polling day | |
| 2 September 1911 | Return of writ |