The 2020–21 Dutch Basketball League (DBL) was the 61st season of the Dutch Basketball League, the highest professional basketball league in the Netherlands. The season started on 3 October 2020 and ended on 27 May 2021. It was the first season after the 2019–20 season was ended prematurely due to the COVID-19 pandemic. The league expanded to 12 teams with the addition of Yoast United, Almere Sailors and The Hague Royals. This marked the highest number of teams since the 2007–08 season. ZZ Leiden won its fourth national title after defeating Heroes Den Bosch in the .