Maria Manuel Leitão Marques (born 23 August 1952) is a Portuguese politician of the Socialist Party[3] who has been serving as a Member of the European Parliament since 2019.

[2] In the 2019 European elections, Leitão Marques ran on the list of Prime Minister António Costa's Socialist Party.

[4] She has since been serving as vice chair of the Committee on the Internal Market and Consumer Protection.

In this capacity, she is the parliament’s rapporteur on the European Commission’s 2022 proposal for a ban on the import and export of products made using forced labour.

[5] In addition to her committee assignments, Leitão Marques is a member of the European Parliament Intergroup on Artificial Intelligence and Digital.