State by-election in Queensland
A by-election for the electoral district of Ipswich West in the Legislative Assembly of Queensland was held on 16 March 2024 following the resignation of Labor MP Jim Madden. The by-election was held on the same day as the Inala by-election and the statewide local government elections.
Madden resigned on 26 January 2024 to contest Division 4 of Ipswich City Council at the March local government elections. 
Although the seat was considered safe for the Labor Party, Liberal National candidate Darren Zanow won the by-election after a 17.9% two-party-preferred swing.
Following the by-election, Zanow was diagnosed with Microvascular Ischemic Disease, an incurable brain disease, on 16 April 2024 − the day he was formally sworn into parliament. He made his diagnosis public on 12 July and announced he would not contest the 2024 Queensland state election in October.
Background.
The by-election was triggered by the resignation of Labor MP Jim Madden, who had served as a member for Ipswich West since 2015 after he defeated sitting Liberal National MP Sean Choat, the first major party non-Labor MP to represent the seat since Nationals MP Albert Hales (who served between 1974 and 1977).
Madden previously announced that he would not contest the 2024 state election, but resigned whilst still in office shortly after the resignation of former premier and Inala MP Annastacia Palaszczuk.
Results.
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align:right;" | Total formal votes
! colspan="3" style="text-align:right;" | Informal votes
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
! colspan="6" style="text-align:left;" |Two-party-preferred result
References.
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