| Friedhelm Kahrs-Ude | | | |
| Michael Kaiser | | | |
| Ratsfrau Anja Kallfelz | GRÜNE | | |
| Betül Kamali | | | |
| Simeon Jonas Kannenberg | | | |
| Sebastian Kappen | Volt | | |
| Ratsfrau Fatma Karana | Die Linke | | |
| Yvonne Karst | SPD | | |
| Soheyla Kasraie | | | |
| Ratsherr Alf Rüdiger Kaßenbrock | CDU | | |
| Dr. Ulrich Kathöfer | GRÜNE | | |
| Christoph Kattentidt | GRÜNE | 31.12.2025 | bis 31.12.2025 |
| Katja Kauke | | | |
| Benedict Kegler | | | |
| Maximilian Kemler | | | |
| Barbara Kemmler | | | |
| Dr. Bodo Kensmann | GRÜNE | | |
| Adriana Kerkgeers-Moormann | | | |
| Ratsherr Mathias Kersting | CDU | | |
| Prof. Dr. Norbert Kersting | | | |
| Roland Keßelmann | | | |
| Bezirksbürgermeister Ralf Kiewit | GRÜNE | | |
| Maximilian Kiffe | | | |
| Dr. Dieter Kinkelbur | | | |
| Sigrid Kioschus | CDU | | |
| Jonas Kipker | | | |
| Ratsfrau Lia Kirsch | SPD | | |
| Karsten Kirschke | | | |
| Thiemo Kisnat | | | |
| Leon Klassen | | | |
| Thomas Klaverkamp | | | |
| Barbara Klein-Reid | | | |
| Christina Kleinefenn | | | |
| Dr. rer. pol. Ansgar Klemann | | | |
| Günter Klemm | | | |
| Prof. Dr.-Ing. Jeanette Klemmer | | | |
| Dr. Michael Klenner | CDU | | |
| Dr. Rainer Klocke | | | |
| Hannah Ko | | | |
| Dr. Martina Kobras | | | |
| Marianne Koch | SPD | | |
| Oliver Koch | GRÜNE | | |
| Prof. Dr. Heike Köckler | | | |
| Michael Koddebusch | | | |
| Frederik Koddenberg | | | |
| Dr. Hendrik Kohl | | | |
| Steffi Köhler | | | |
| Katharina Köhnke | SPD | | |
| Peer Kollecker | | | |
| Thomas Kollmann | SPD | 09.12.2025 | bis 09.12.2025 |
| Ratsfrau Katharina Könning | GRÜNE | | |
| Ratsherr Sven Konopka | Volt | | |
| Sebastian Koppers | | | |
| Maxime Kops | GRÜNE | | |
| Thorsten Korinth | | | |
| Dr. Tim Kornblum | | | |
| Ratsherr Dr. Robin Korte | GRÜNE | | |
| Ulrike Kötter | GRÜNE | | |
| Bernd Krabbe | | | |
| Sten Kramin | | | |
| Claudia Krampe | CDU | | |
| Ratsherr Michael Krapp | ÖDP | | |
| Sabina Krappmann-Klute | GRÜNE | | |
| Hille Krause | | | |
| Bezirksbürgermeisterin Elke Kraut-Kleinschmidt | SPD | | |
| Dr. Joachim Kremerskothen | | | |
| Richard Kretschmann | | | |
| Klaus Kretzer | | | |
| Beate Kretzschmar | SPD | | |
| Astrid-Maria Kreyerhoff | | 03.02.2026 | bis 03.02.2026 |
| Jürgen Krichel | CDU | | |
| Lars Kröger | | | |
| Alexander Krombolz | | | |
| Barbara Krömer | CDU | | |
| Gianna Krüger | CDU | | |
| Natalia Krukov | | | |
| Gerd Krützmann | GRÜNE | | |
| Jan-Reinhard Kubandt | | | |
| Gabriele Kubig-Steltig | SPD | 25.02.2026 | bis 25.02.2026 |
| Thorsten Kubitza | | | |
| Dr. Mechthild Kuhlmann-Wesseling | | | |
| Felix Kusgörd | | | |
