| Club: | Real Madrid |
| Season: | 2020–21 |
| Chrtitle: | President |
| Chairman: |  Florentino Pérez |
| Manager: | Pablo Laso |
| Stadium: | WiZink Center |
| League: | Liga ACB |
| League Result: | Runners-up |
| League2: | EuroLeague |
| League2 Result: | Playoffs |
| Cup1: | |
| Cup1 Result: | Runners-up |
| Cup2: | |
| Cup2 Result: | Winners |
| Largest Win: | (4 April 2021) (8 April 2021) |
| Largest Loss: | (20 April 2021) |
| H Pattern B: | _realmadrid2021h |
| H Pattern S: | _realmadrid2021h |
| A Body: | _realmadridcf2021t |
| A Pattern B: | _realmadridcf2021t |
| A Shorts: | _realmadridcf2021t |
| A Pattern S: | _realmadridcf2021t |
| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 season was Real Madrid's 90th in existence, their 65th consecutive season in the top flight of Spanish basketball and 14th consecutive season in the EuroLeague. It was also the tenth season in a row under head coach Pablo Laso.
Times up to 24 October 2020 and from 28 March 2021 were CEST (UTC+2). Times from 25 October 2020 to 27 March 2021 were CET (UTC+1).
Real Madrid started up its hunt for its 11th Turkish Airlines EuroLeague crown with the beginning of training camp for the 2020–21 season. Madrid head coach Pablo Laso called together his team knowing he won't have a lot of new faces to incorporate. Madrid did not make many major changes during the off-season as Laso retained nearly his enter roster from last season, when the team went 22–6 in the EuroLeague for second place when the season was halted by the COVID-19 pandemic. Real Madrid opened the EuroLeague Regular Season on October 2 with a road game against TD Systems Baskonia.[1]
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See also: List of 2020–21 EuroLeague transactions.
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See main article: article and 2021 ACB Playoffs.