2024 Cook by-election

A by-election to elect the next member of the Australian House of Representatives in the electorate of Cook was held on 13 April 2024, following the resignation of sitting Liberal member and former Prime Minister Scott Morrison.

Morrison's resignation was first announced on 23 January 2024, and came into effect on 28 February 2024.

Liberal candidate Simon Kennedy succeeded Morrison as the new member for Cook. It was the fourth federal by-election to have taken place since the first sitting of the 47th Parliament.

Seat details
Cook encompasses much of Sutherland Shire in Sydney's southern suburbs. It was first contested at the 1969 Australian federal election and named after naval captain and explorer James Cook. It has been held by the Liberal Party for all but two terms, the lone exception being 1972-1975 when the Australian Labor Party held the seat. The Liberal margin swelled in the Coalition's 1996 victory. Since then, Cook has been one of the safest Liberal seats in metropolitan Australia.

Demographics
During the 2021 Australian census, Cook's median age of 42 exceeded both the national (38) and state (39) medians. In the realm of economic indicators, the median personal weekly income in Cook amounted to $991, surpassing the corresponding figures for the state and nation, which stood at $813 and $805 respectively. Additionally, the demographic composition of the electorate saw over 60 percent identifying their ancestry as English or Australian.

2022 election results
At the time of the 2022 election, Morrison sat on a majority of 19 percent, making Cook the safest Coalition seat in metropolitan Australia. He retained the seat with a 62.44% two-party-preferred vote and a 6.58% swing against him. He lost 8.17% of his primary vote from 2019. On the other hand, all other parties who contested the election (Labor, Greens, One Nation and United Australian Party) had increases in their primary votes, being 1.89%, 3.09%, 1.61% and 3.27% respectively. Only Labor had a primary vote of more than 10% (24.99%), while the Green's primary vote was just below 10% (9.90%).

Candidates
Candidates are listed in the order they will appear on the ballot.

Labor
On 22 March the Labor Party announced they would not run a candidate in the by-election. This is the first time since the 2015 North Sydney by-election that they have not contested a federal by-election.

Liberal
On 4 March former Bennelong candidate Simon Kennedy won Liberal Party preselection. Other candidates were Sutherland Shire mayor Carmelo Pesce, Veteran Family Advocate Commissioner Gwen Cherne (endorsed by former prime minister John Howard) and former United Australia Party candidate Benjamin Britton.

Results
On 16 April 2024 the Australian Electoral Commission declared Simon Kennedy officially elected as the new member for Cook.