Herbert Reul (born 31 August 1952) is a German politician of the Christian Democratic Union (CDU) who has been serving as State Minister for Internal Affairs in the government of successive Ministers-President Armin Laschet (2017–2021) and Hendrik Wüst (since 2021).

Between 1991 and 2003, he served as Secretary General of the CDU in North Rhine-Westphalia, under the leadership of successive chairmen Norbert Blüm (1993–99) and Jürgen Rüttgers (1999-2003).

Reul was widely regarded as one of the driving forces behind blocking Martin Schulz’ reelection as President of the European Parliament in early 2017.

[16] Since 2012, he has been serving on the Presidium of the CDU, under the leadership of successive chairs Angela Merkel (2012–2018), Annegret Kramp-Karrenbauer (2018–2021) and Armin Laschet (2021).

[17] Together with Frank Henkel, Peter Hintze, Annegret Kramp-Karrenbauer, Christine Lieberknecht, David McAllister and Annette Widmann-Mauz, Reul co-chaired the CDU’s 2014 national convention in Berlin.

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