Joanne Marie Platt is a British Labour and Co-operative politician who has represented Leigh and Atherton in Parliament since 2024. Born on 15 June 1973, she first entered the House of Commons in 2017 when she was elected as Member of Parliament for Leigh, a position she held until 2019. Following a period outside Parliament, Platt returned to Westminster in 2024 to serve the reconfigured constituency of Leigh and Atherton, resuming her parliamentary career and continuing her representation of communities in Greater Manchester.

Throughout her time in politics, Platt has focused on issues affecting her constituents in the Leigh area and has worked within the Labour and Co-operative movement to advance policy objectives aligned with her party's values. She writes commentary for Comment Central, offering her perspectives on political developments and policy matters.