A by-election was held for the New South Wales Legislative Assembly electorate of Hartley on 13 December 1947 because of the resignation of Hamilton Knight to accept an appointment as a Commissioner in the Commonwealth Industrial Commission.[1]
| Date | Event | |
|---|---|---|
| 29 October 1947 | Hamilton Knight resigned. | |
| 14 November 1947 | Writ of election issued by the Speaker of the Legislative Assembly.[2] | |
| 28 November 1947 | Nominations | |
| 13 December 1947 | Polling day | |
| 2 January 1948 | Return of writ |