Marcus Bakker (20 June 1923 – 24 December 2009) was a Dutch politician of the defunct Communist Party of the Netherlands (CPN) now merged into the GroenLinks (GL) party and journalist.
Bakker was the son of an accountant who worked for the slaughterhouse in Zaandam. He joined the then illegal Communist Party of the Netherlands (CPN) in 1943, during World War II. After the war he became an editor of the communist daily newspaper De Waarheid and an official of the CPN.
In 1953, Bakker became editor-in-chief of De Waarheid, and in 1956 a member of the House of Representatives. He was a confidant of the then party leader Paul de Groot, who took firm action against dissident movements within the party. Bakker wrote a book called De CPN in de oorlog ("The CPN during the war", 1958), in which he accused prominent party members such as Gerben Wagenaar, Henk Gortzak, Frits Reuter and Bertus Brandsen of being spies. They were eventually