Marc Biadacz (born 3 September 1979) is a German politician of the Christian Democratic Union (CDU) who has been serving as a member of the Bundestag from the state of Baden-Württemberg since 2017.

Biadacz became a member of the Bundestag in the 2017 German federal election, representing the electoral district of Böblingen in Baden-Württemberg. In parliament, he is a member of the Committee on Petitions and the Committee on Labour and Social Affairs. In this capacity, he serves as his parliamentary group’s rapporteur on migrant workers.

Ahead of the 2021 national elections, Biadacz endorsed Markus Söder as the Christian Democrats' joint candidate to succeed Chancellor Angela Merkel.