Matthias Zimmer (3 May 1961 – 19 July 2023) was a German author and politician of the Christian Democratic Union (CDU) who served as a member of the Bundestag from the state of Hesse from 2009, winning a constituency in Frankfurt am Main for three terms until 2021.

[3][4] In addition to his committee assignments, Zimmer co-chaired the German-Canadian Parliamentary Friendship Group.

In an internal vote on the CDU candidate for the 2021 elections, Zimmer lost against Axel Kaufmann.

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

[6] In 2019, Zimmer joined 14 members of his parliamentary group who, in an open letter, called for the party to rally around Angela Merkel and party chairwoman Annegret Kramp-Karrenbauer amid criticism voiced by conservatives Friedrich Merz and Roland Koch.