Marcus Weinberg (born 4 June 1967 in Hamburg) is a German politician who served as a member of the Bundestag from 2005 to 2021.

In the negotiations to form a Grand Coalition of Chancellor Angela Merkel's Christian Democrats (CDU together with the Bavarian CSU) and the Social Democrats following the 2013 federal elections, Weinberg was part of the CDU/CSU delegation in the working group on education and research policy, led by Johanna Wanka and Doris Ahnen.

[3] In June 2017, Weinberg voted against his parliamentary group's majority and in favor of Germany's introduction of same-sex marriage.

[5] Ahead of the Christian Democrats’ leadership election in 2018, Weinberg publicly endorsed Annegret Kramp-Karrenbauer to succeed Angela Merkel as the party's chair.

[6] He later expressed support for Jens Spahn[7] but eventually endorsed Norbert Röttgen as Kramp-Karrenbauer's successor at the party's 2021 leadership election.