A by-election for the New South Wales Legislative Assembly seat of Pittwater was held on 19 October 2024, following the resignation of Liberal MP Rory Amon.
Amon resigned from parliament on 30 August 2024 after he was charged with child sex offences. Several hours prior to resigning from parliament, Amon also resigned as a member of the Liberal Party.
Independent Jacqui Scruby was elected.
On 11 September 2024 Manly ward councillor Georgia Ryburn defeated fellow councillors Michael Gencher from Pittwater ward and Bianca Crvelin from Narrabeen ward along with lawyer Claire Longley to win Liberal Party preselection. Ryburn previously served as the deputy mayor of Northern Beaches Council, but was unable to contest the local government elections on 14 September after the Liberal Party missed the candidate nomination deadline.
The governing Labor Party did not contest the by-election with Premier Chris Minns stating "a swing against us would be a massive distraction".