Pedro Manuel Dias de Jesus Marques (born 1976) is a Portuguese politician of the Socialist Party (PS) who has been serving as Member of the European Parliament between 2019 until July 2024.

He was invited by the Minister of Labor and Social Solidarity, José António Vieira da Silva, to integrate the XVII Constitutional Government, in 2005.

He served as vice-president of the Parliamentary Group of the Socialist Party until 2014, when he returned to the private sector to join Capgemini Portugal.

Following his involvement, as coordinator of the Agenda for the Decade, he was invited by the Prime Minister António Costa to integrate the XXI Constitutional Government.

[3][4] In 2020, Marques succeeded Miriam Dalli was elected vice-chair of the S&D Group, under the leadership of chairwoman Iratxe García,[5] having been re-elected in December 2021.