| 2020–21 Czech Extraliga season | |
| League: | Czech Extraliga |
| Sport: | Ice hockey |
| Duration: | September 2020 – April 2021 |
| No Of Games: | 52 |
| No Of Teams: | 14 |
| Season: | Regular Season |
| Season Champs: | Sparta Praha |
| Season Champ Name: | Presidential Cup |
| Playoffs: | Playoffs |
| Playoffs Link: |
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| Finals: | Finals |
| Finals Champ: | HC Oceláři Třinec |
| Finals Runner-Up: | HC Bílí Tygři Liberec |
| Seasonslist: | List of Czech Extraliga seasons |
| Seasonslistnames: | Czech Extraliga |
| Prevseason Link: | 2019–20 Czech Extraliga season |
| Prevseason Year: | 2019–20 |
| Nextseason Link: | 2021–22 Czech Extraliga season |
| Nextseason Year: | 2021–22 |
The 2020–21 Czech Extraliga season was the 28th season of the Czech Extraliga since its creation after the breakup of Czechoslovakia and the Czechoslovak First Ice Hockey League in 1993.[1]
Each team played 52 games, playing each of the other thirteen teams four times. Points were awarded for each game, where three points were awarded for winning in regulation time, two points for winning in overtime or shootout, one point for losing in overtime or shootout, and zero points for losing in regulation time. At the end of the regular season, the team that finished with the most points was crowned the league champion.
Twelve teams qualify for the playoffs: the top four teams in the regular season have a bye to the quarterfinals, while teams ranked fifth to twelfth meet each other (5 versus 12, 6 versus 11, 7 versus 10, 8 versus 9) in a preliminary playoff round.
Třinec wins the finals 4–1.
| Třinec | ||
| Liberec | ||
| Sparta Praha | ||
| 4 | Mladá Boleslav | |
| 5 | Mountfield HK | |
| 6 | Pardubice | |
| 7 | Kometa Brno | |
| 8 | Olomouc | |
| 9 | Plzeň | |
| 10 | Vítkovice | |
| 11 | Karlovy Vary | |
| 12 | Litvínov | |
| 13 | Zlín | |
| 14 | České Budějovice |