1. FC Köln
Zugänge
| ab | Name | Pos | Mannschaft | Team | ||
|---|---|---|---|---|---|---|
| 04/2021 |  | Friedhelm Funkel | TR | |||
| 03/2021 | | Marvin Obuz | ST | |||
| 01/2021 | | Max Meyer | MF |  | Crystal Palace | Cr. Palace |
| 01/2021 |  | Emmanuel Dennis | ST |  | FC Brügge | FC Brügge |
| 10/2020 | | Marius Wolf | MF |  | Borussia Dortmund | Dortmund |
| 09/2020 |  | Dimitris Limnios | ST |  | PAOK Saloniki | PAOK |
| 09/2020 | | Toluwalase Arokodare | ST |  | Valmiera FC | Valmiera FC |
| 09/2020 |  | Ondrej Duda | MF |  | Hertha BSC | Hertha BSC |
| 09/2020 |  | Sebastian Andersson | ST |  | 1. FC Union Berlin | Union Berlin |
| 09/2020 |  | Sava Čestić | AB | |||
| 09/2020 |  | Frederik Sørensen | AB |  | BSC Young Boys | Young Boys |
| 08/2020 | | Ron-Robert Zieler | TW |  | Hannover 96 | Hannover |
| 07/2020 |  | Tomáš Ostrák | MF |  | TSV Hartberg | TSV Hartberg |
| 07/2020 | | Yann Aurel Bisseck | AB |  | Roda JC Kerkrade | Roda JC |
| 07/2020 | | Jannes Horn | AB | | Hannover 96 | Hannover |
| 07/2020 |  | João Queirós | AB |  | Willem II | Willem II |
| 07/2020 | | Lasse Sobiech | AB |  | Royal Excel Mouscron | Excel Mouscron |
| 07/2020 | | Salih Özcan | MF |  | Holstein Kiel | Holstein Kiel |
| 07/2020 |  | Louis Schaub | MF |  | Hamburger SV | Hamburg |
| 07/2020 | | Leif Frach | AT-TR |  | 1. FC Köln II | Köln II |
Abgänge
| ab | Name | Pos | Mannschaft | Team | ||
|---|---|---|---|---|---|---|
| 02/2021 |  | Anthony Modeste | ST |  | AS Saint-Étienne | Saint-Étienne |
| 01/2021 | | Frederik Sørensen | AB |  | Pescara Calcio | Pescara |
| 01/2021 | | Christian Clemens | MF |  | SV Darmstadt 98 | Darmstadt |
| 09/2020 | | Louis Schaub | MF |  | FC Luzern | FC Luzern |
| 09/2020 |  | Jhon Córdoba | ST | | Hertha BSC | Hertha BSC |
| 09/2020 | | Lasse Sobiech | AB |  | FC Zürich | FC Zürich |
| 08/2020 | | Simon Terodde | ST | | Hamburger SV | Hamburg |
| 08/2020 | | Marcel Risse | MF |  | Viktoria Köln | Vikt. Köln |
| 08/2020 |  | Brady Scott | TW |  | Sacramento Republic | Sacramento Rep |
| 08/2020 | | Tomáš Ostrák | MF |  | MFK Karvina | MFK Karvina |
| 08/2020 | | Kingsley Schindler | MF | | Hannover 96 | Hannover |
| 07/2020 | | Yann Aurel Bisseck | AB |  | Vitória Guimarães | Vitória SC |
| 07/2020 | | Toni Leistner | AB |  | Queens Park Rangers | QPR |
| 07/2020 | | Robert Voloder | AB | | 1. FC Köln II | Köln II |
| 07/2020 | | Niklas Hauptmann | MF | | Holstein Kiel | Holstein Kiel |
| 07/2020 |  | Birger Verstraete | MF |  | Royal Antwerp FC | Antwerpen |
| 07/2020 | | Mark Uth | ST |  | FC Schalke 04 | Schalke |
| 07/2020 | | Dennis Morschel | RE-TR | | Borussia Dortmund | Dortmund |