|15 March 1939||Death of John Waddell.|
|24 March 1939||Writ of election issued by the Speaker of the Legislative Assembly.|
|3 April 1939||Nominations|
|22 April 1939||Polling day|
|5 May 1939||Return of writ|
|Industrial Labor||Clarrie Martin||6,397||34.8|
|United Australia||Ella Waddell [a]||6,539||34.6||-16.8|
|Total formal votes||18,386||98.0||-0.1|
|Industrial Labor||Clarrie Martin||10,477||56.8|
|United Australia||Ella Waddell [a]||7,939||43.2||-8.2|
|Industrial Labor gain from United Australia||Swing||N/A|
- Ella Waddell was the widow of former member John Waddell.
- "Mr John William Waddell (1891–1939)". Former Members of the Parliament of New South Wales. Retrieved 15 June 2019.
- "Writ of election: Waverley". New South Wales Government Gazette. No. 49. 24 March 1939. p. 1453. Retrieved 26 March 2021 – via Trove.
- Green, Antony. "1939 Waverley by-election". New South Wales Election Results 1856-2007. Parliament of New South Wales. Retrieved 26 March 2021.