Mark McGowan Roger Cook Roger Cook Rita Saffioti A leadership election for the Western Australian Labor Party occurred on 6 June 2023 following the resignation of party leader and premier of Western Australia Mark McGowan in June 2023.

The three contenders to replace McGowan were Roger Cook, Amber-Jade Sanderson and Rita Saffioti.

[4] ABC News, WAtoday, Business News and The West Australian reported that the most likely candidates to replace McGowan are Deputy Premier Roger Cook, Health Minister Amber-Jade Sanderson and Transport Minister Rita Saffioti.

[6][13] Unpublished polling conducted by Painted Dog Research for The West Australian in January 2023 found that Cook was favoured by 15 percent of voters to succeed McGowan if he were to retire.

[8] These rules were instituted following the political instability of the Rudd and Gillard federal Labor governments.

Cook expressed a desire for the party to unite behind one candidate so that the process could be completed by the end of the week.

[4] 26 Labor MPs affiliated with the UWU held a meeting on the morning of 30 May to determine who to support.

[23] McGowan formally resigned on Thursday 8 June and Cook and his ministry were sworn in on that day.

[25] Had Saffioti and Sanderson not stood aside, either could have balloted the entire WA Labor membership leaving the State with an interim premier for up to two months.