| Club: | Holstein Kiel |
| Season: | 2020–21 |
| Chrtitle: | President |
| Chairman: | Steffen Schneekloth |
| Mgrtitle: | Head coach |
| Manager: | Ole Werner |
| Stadium: | Holstein-Stadion |
| League: | 2. Bundesliga |
| League Result: | 3rd |
| Cup1: | DFB-Pokal |
| Cup1 Result: | Semi-finals |
| League Topscorer: | Alexander Mühling (12) |
| Season Topscorer: | Alexander Mühling (13) |
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| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 Holstein Kiel season was the club's 121st season in existence and the club's fourth consecutive season in the second flight of German football. In addition to the domestic league, Holstein Kiel participated in this season's edition of the DFB-Pokal. The season covered the period from 1 July 2020 to 30 June 2021.
| Date | scope=col | Player | From | scope=col; style="width: 65px;" | Fee | scope=col class=unsortable | Source | |
|---|---|---|---|---|---|---|---|---|
| VfB Lübeck | Free | [1] | ||||||
| VfL Bochum | Free | [2] | ||||||
| SV Meppen | Free | [3] | ||||||
| Wisła Płock | Free | [4] |
| Date from | scope=col | Player | From | scope=col | Date until | scope=col class=unsortable | Source | |
|---|---|---|---|---|---|---|---|---|
| 1. FC Köln | [5] |
| Date | scope=col | Player | To | scope=col; style="width: 65px;" | Fee | scope=col class=unsortable | Source | |
|---|---|---|---|---|---|---|---|---|
| Released | [6] | |||||||
| Daejeon Hana Citizen | Released | [7] [8] | ||||||
| 1. FC Köln | Loan return | [9] | ||||||
| Fortuna Düsseldorf | Loan return | [10] | ||||||
| Red Bull Salzburg | Loan return | [11] | ||||||
| FC Zürich | Loan return | [12] |
| Date from | scope=col | Player | Transferred to | scope=col | Date until | scope=col class=unsortable | Source | |
|---|---|---|---|---|---|---|---|---|
| 1. FC Magdeburg | [13] |
See main article: 2020–21 2. Bundesliga.
The league fixtures were announced on 7 August 2020.[14]
As a result of their third place finish in the regular season, the club qualified for the play-off match with the 16th-place team in the 2020–21 Bundesliga to determine whether the club would be promoted to the 2021–22 Bundesliga.
See main article: 2020–21 DFB-Pokal.
|-! colspan=16 style=background:#dcdcdc; text-align:center| Goalkeepers|-! colspan=16 style=background:#dcdcdc; text-align:center| Defenders|-! colspan=16 style=background:#dcdcdc; text-align:center| Midfielders|-! colspan=16 style=background:#dcdcdc; text-align:center| Forwards|-! colspan=16 style=background:#dcdcdc; text-align:center| Players transferred out during the season