Joanne Marie Platt (born 15 June 1973) is a British Labour and Co-operative politician who has served as Member of Parliament (MP) for Leigh and Atherton since 2024.

[1] She was appointed as the Cabinet Member for Children and Young People in June 2014,[2] and served as the Secretary of the Leigh Constituency Labour Party during her tenure on the council.

[5] Upon her election, Platt advocated greater investment for post-industrial towns, restoring rail connectivity, increased local post-16 education provision and highlighting opportunities arising from devolution.

[13][14][15] In March 2019, Platt advocated having a single Cybersecurity Minister and a government approach that facilitates the growth of the UK cyber sector in post-industrial towns.

[17] Platt set up and chaired the All Party Parliamentary Group on attention deficit hyperactivity disorder, informing and advising Ministers of the barriers those with ADHD face and the change that is required.