| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
| Extraliga | |
| T Bg: |
|
| T Color: | white |
| Season: | 2020–21 |
| Champions: | Spišskí Rytieri (1st title) |
| Runners Up: | Patrioti Levice |
| Teams: | 7 |
The 2020–21 Slovak Basketball League season was the 29th season of the top-tier basketball competition in Slovakia. Spišskí Rytieri won its first ever Slovak championship. Rytieri also won the Slovak Basketball Cup, thus winning the double.
Seven teams of the previous season are repeating participation in the league, while Slávia Žilina and Rieker Com Therm Komárno withdrew due to financial difficulties.[1]
| Team | City | Arena | Capacity | |
|---|---|---|---|---|
| Handlová | Handlová | Športová Hala | ||
| Inter Bratislava | Bratislava | Hant Aréna | ||
| Iskra Svit | Svit | Iskra Aréna | ||
| Lučenec | Lučenec | Športová Hala Arena | ||
| Patrioti Levice | Levice | Športová Hala Levice | ||
| Prievidza | Prievidza | Niké Aréna | ||
| Spiš Knights | Spišská Nová Ves | Mestska Sportova Hala |
Inter Bratislava vs. BKM Lučenec
Iskra Svit vs. Prievidza
Patrioti Levice vs. Inter Bratislava
Spis Knights vs. Iskra Svit
| Team | Competition | Progress |
|---|---|---|
| Inter Bratislava | Alpe Adria Cup | |
| Levicki Patrioti | ||
| Lučenec | ||
| Spiš Knights | ||