| Dietmar Nietan | |
| Office: | Treasurer of the Social Democratic Party |
| Leader: | Sigmar Gabriel Martin Schulz Andrea Nahles Norbert Walter-Borjans Saskia Esken Lars Klingbeil |
| Term Start: | 26 January 2014 |
| Predecessor: | Barbara Hendricks |
| Office1: | Member of the Bundestag |
| Term Start1: | 2005 |
| Term Start2: | 1998 |
| Term End2: | 2002 |
| Birth Date: | 1964 5, df=yes |
| Birth Place: | Düren, West Germany |
| Party: | SPD |
| Nationality: | German |
| Alma Mater: | University of Cologne |
Dietmar Heinrich Nietan (born 25 May 1964) is a German politician of the Social Democratic Party (SPD) who has been serving as a member of the Bundestag from the state of North Rhine-Westphalia from 1998 to 2002 and since 2005.[1] In addition to his parliamentary work, he has been serving as the Coordinator of German-Polish Intersocietal and Cross-Border Cooperation at the Federal Foreign Office in the coalition government of Chancellor Olaf Scholz since 2022.[2]
In 2014, Nietan became the SPD's treasurer, making him part of the party's national leadership under current co-chairs Saskia Esken and Lars Klingbeil.
Nietan became a member of the Bundestag for the second time in the 2017 German federal election.[3] He is a member of the Committee on Foreign Affairs;[4] in this capacity, he serves as his parliamentary group's rapporteur on the European Union's Common Foreign and Security Policy and relations to Turkey.[5] He also served on the Committee on European Affairs from 1998 until 2005 and from 2009 until 2013.
In addition to his committee assignments, Nietan is part of the German-Polish Parliamentary Friendship Group. From 2005 until 2009, he chaired the German Parliamentary Friendship Group with Belgium and Luxembourg.
Within the SPD parliamentary group, Nietan belongs to the Parliamentary Left, a left-wing movement.[6]
In the negotiations to form a coalition government under the leadership of Chancellor Angela Merkel following the 2017 federal elections, Nietan was part of the working group on energy, climate protection and the environment, led by Armin Laschet, Georg Nüßlein and Barbara Hendricks.
In the negotiations to form a so-called traffic light coalition of the SPD, the Green Party and the Free Democratic Party (FDP) following the 2021 federal elections, Nietan was part of his party's delegation in the working group on foreign policy, defence, development cooperation and human rights, co-chaired by Heiko Maas, Omid Nouripour and Alexander Graf Lambsdorff.[7]
In April 2024, Nietan announced that he would not stand in the 2025 federal elections but instead resign from active politics by the end of the parliamentary term.[8]